Monday, December 13, 2010
Thursday, Dec 16, 2010
Collected Looney Tunes and Pulley Labs.
Students did Cookie Lab
Students could check answers on the computer.
Students did Cookie Lab
Students could check answers on the computer.
Wednesday, Dec 15, 2010
Handed back reading assignments and went over any questions.
Went over questions on the energy problem worksheet.
Answered questions on Looney Tunes and Pulley Labs.
Brought out swinging ball device and showed that situations that still obey conservation of momentum do not happen because they do not conserve energy.
Didn't do: Showed Ballistic Pendulum Lab using energy without the photogate.
Went over questions on the energy problem worksheet.
Answered questions on Looney Tunes and Pulley Labs.
Brought out swinging ball device and showed that situations that still obey conservation of momentum do not happen because they do not conserve energy.
Didn't do: Showed Ballistic Pendulum Lab using energy without the photogate.
Friday, November 19, 2010
Friday, Dec 10, 2010
Collected RA 6.2 and redo of RA 6.1
Handed out RA 6.3 due tomorrow.
Did several examples using the energy balance equation.
Prepped the Looney Tune Lab for tomorrow.
Wrote energy balance for pushing on block with friction and solved for final velocity. Solved the equation using acceleration to get the same answer.
Showed technique of inserting the coefficient into the KE or PE terms to calculate the new KE or new PE. Very powerful and useful technique. (Ex. What happens to the stopping distance of a car if you double the speed and double the mass?
KE old = 1/2 * m*v^2
KE new = 1/2 (2m) * (2v)^2 = 8 * 1/2 * m * v^2
Handed out problem sheet on energy. Gave students time to work on the problems in class.
Handed out RA 6.3 due tomorrow.
Did several examples using the energy balance equation.
Prepped the Looney Tune Lab for tomorrow.
Wrote energy balance for pushing on block with friction and solved for final velocity. Solved the equation using acceleration to get the same answer.
Showed technique of inserting the coefficient into the KE or PE terms to calculate the new KE or new PE. Very powerful and useful technique. (Ex. What happens to the stopping distance of a car if you double the speed and double the mass?
KE old = 1/2 * m*v^2
KE new = 1/2 (2m) * (2v)^2 = 8 * 1/2 * m * v^2
Handed out problem sheet on energy. Gave students time to work on the problems in class.
Thursday, Dec 9, 2010
Handed out RA 6.2 due tomorrow.
Students did a poor job on RA 6.1 so I had them correct mistakes.
Students did Roller Coaster Lab.
Write-up due on Monday.
Students did a poor job on RA 6.1 so I had them correct mistakes.
Students did Roller Coaster Lab.
Write-up due on Monday.
Wed, Dec 8, 2010
Handed back and went over Momentum Test
Started energy
Feynman's Block example
Types of Energy
Places energy can hide - for this unit, GPE = m g h, KE = 1/2 m v^2, Elastic PE = 1/2 k x^2, work = F * d where F is the component of force in the direction of motion.
Conservation of Energy and Energy Balance Equation.
Did example of lifting a 10 kg mass. First at 120 N for 2 seconds, then at 100 N for 4 seconds and then at 60 N for 1 sec to slow it down. Drew force vs time graph. Showed applied force, weight, and net force. Since net impulse is zero, there is no change in momentum and the block comes to rest. Calculated the work done and showed that it was equal to the change in gravitational potential energy.
Main idea: If you lift an object, the work you do is equal to the increase in gravitational potential energy.
Handed out RA 6.1 due tomorrow.
Prepped Roller Coaster Lab.
Started energy
Feynman's Block example
Types of Energy
Places energy can hide - for this unit, GPE = m g h, KE = 1/2 m v^2, Elastic PE = 1/2 k x^2, work = F * d where F is the component of force in the direction of motion.
Conservation of Energy and Energy Balance Equation.
Did example of lifting a 10 kg mass. First at 120 N for 2 seconds, then at 100 N for 4 seconds and then at 60 N for 1 sec to slow it down. Drew force vs time graph. Showed applied force, weight, and net force. Since net impulse is zero, there is no change in momentum and the block comes to rest. Calculated the work done and showed that it was equal to the change in gravitational potential energy.
Main idea: If you lift an object, the work you do is equal to the increase in gravitational potential energy.
Handed out RA 6.1 due tomorrow.
Prepped Roller Coaster Lab.
Friday, Dec 3, 2010
Went over calculating impulse from Force vs Time graphs.
Showed how to solve problems with 2-D inelastic collisions.
Gave quizzes on
7-block elastic collision
7-block elastic and inelastic collisions with different velocities
quiz on impulse and momentum
2nd quiz on impulse and momentum
Assigned end of chapter questions to look at for next time:
2,5,6,7,10,11,12,13.15.19.22.23.25.26.27.28.29.30.31.32.33.35.38.39
Problems 1-6
Showed how to solve problems with 2-D inelastic collisions.
Gave quizzes on
7-block elastic collision
7-block elastic and inelastic collisions with different velocities
quiz on impulse and momentum
2nd quiz on impulse and momentum
Assigned end of chapter questions to look at for next time:
2,5,6,7,10,11,12,13.15.19.22.23.25.26.27.28.29.30.31.32.33.35.38.39
Problems 1-6
Thursday, Dec 2, 2010
Hand back RA 5.2
Show models of elastic collisions - slingshot effect, supernova
Multi-block elastic collisions
Multi-block inelastic collisions
Demo Ballistic Pendulum
Hand out Momentum and Impulse Problem Sheet
Gave students time to work on problems
Test on Tuesday
Show models of elastic collisions - slingshot effect, supernova
Multi-block elastic collisions
Multi-block inelastic collisions
Demo Ballistic Pendulum
Hand out Momentum and Impulse Problem Sheet
Gave students time to work on problems
Test on Tuesday
Wed, Dec 1, 2010
Handed back RA 5.1 and went over it
Collected Inelastic Collision worksheet
Collected RA 5.2
Reviewed collisions.
Collisions Lab
Bowling ball and golf ball competition.
Collected Inelastic Collision worksheet
Collected RA 5.2
Reviewed collisions.
Collisions Lab
Bowling ball and golf ball competition.
Tuesday, Nov 30, 2010
Collected RA 5.1
Handed out RA 5.2 due tomorrow.
Went around the room and asked what they remembered from last class.
Show parts of video dealing with boxing, railroad cars.
Demo with blowpipes and marshmallows to show that longer cannons impart more impulse (same force, longer time) than short cannons. Actually did this yesterday.
Catching and throwing on frictionless ice both give impulse. Catching and throwing is like bouncing. More impulse if bouncing occurs. But...don't know anything about the force unless you know something about the time.
Skare's demo with happy and sad balls knocking down block.
Bouncing gives greater impulse since there is a greater change in momentum. We know nothing about the force unless we know something about the time.
Showed part of video on Pelton Waterwheel
Intro to conservation of momentum: If no net external force acts on the system, then there is no change in momentum.
Conservation of Momentum has never been shown to fail. It does not apply in cases in which there is an external force (such as gravity for a falling object).
Applied Conservation of Momentum to collisions.
Two basic types of collisions:
1. Elastic (Things bounce)
2. Inelastic (Things stick)
If there is no net external force, momentum is conserved in both types of collisions.
Demos with air track for both types of collisions.
Worked inelastic collision problems on board showing problems solving strategy.
Handed out Inelastic Collisions worksheet. Students worked on it in class and handed it in. Actually ran out of time so had students do it for HW
Handed out CD chpt 5 due for the last time on Monday. It asks for pictures, if you don't draw them then I will return the paper.
Handed out RA 5.2 due tomorrow.
Went around the room and asked what they remembered from last class.
Show parts of video dealing with boxing, railroad cars.
Demo with blowpipes and marshmallows to show that longer cannons impart more impulse (same force, longer time) than short cannons. Actually did this yesterday.
Catching and throwing on frictionless ice both give impulse. Catching and throwing is like bouncing. More impulse if bouncing occurs. But...don't know anything about the force unless you know something about the time.
Skare's demo with happy and sad balls knocking down block.
Bouncing gives greater impulse since there is a greater change in momentum. We know nothing about the force unless we know something about the time.
Showed part of video on Pelton Waterwheel
Intro to conservation of momentum: If no net external force acts on the system, then there is no change in momentum.
Conservation of Momentum has never been shown to fail. It does not apply in cases in which there is an external force (such as gravity for a falling object).
Applied Conservation of Momentum to collisions.
Two basic types of collisions:
1. Elastic (Things bounce)
2. Inelastic (Things stick)
If there is no net external force, momentum is conserved in both types of collisions.
Demos with air track for both types of collisions.
Worked inelastic collision problems on board showing problems solving strategy.
Handed out Inelastic Collisions worksheet. Students worked on it in class and handed it in. Actually ran out of time so had students do it for HW
Handed out CD chpt 5 due for the last time on Monday. It asks for pictures, if you don't draw them then I will return the paper.
Monday, Nov 29, 2010
Go over Newton's 3rd Law test.
Introduction to impulse and momentum lesson
Content Objectives:
Student will be able to
. Define impulse and momentum
. Give the correct units for impulse and momentum
. Calculate impulse and momentum
. State that impulse = change in momentum
. Describe several real-life examples using impulse = change in momentum
. Explain why impulse is greater in bouncing than in sticking
Handed out RA 5.1 due Tuesday
Assigned Quia Quiz 5.1-15 Random - REQUIRED QUIZ - do by Wed and get 100% correct
Also put up full quiz with all questions.
Impulse = Fnet*time
Units of impulse = N s
Momentum = mass * velocity = inertia in motion = ooomph
Units of momentum = kg m/s
Derived Impulse = Change in momentum
Several examples of F*t for same change in momentum
Egg toss lab
Force plate demo - flex knees, lock knees
Marshmallow blow gun demo.
Introduction to impulse and momentum lesson
Content Objectives:
Student will be able to
. Define impulse and momentum
. Give the correct units for impulse and momentum
. Calculate impulse and momentum
. State that impulse = change in momentum
. Describe several real-life examples using impulse = change in momentum
. Explain why impulse is greater in bouncing than in sticking
Handed out RA 5.1 due Tuesday
Assigned Quia Quiz 5.1-15 Random - REQUIRED QUIZ - do by Wed and get 100% correct
Also put up full quiz with all questions.
Impulse = Fnet*time
Units of impulse = N s
Momentum = mass * velocity = inertia in motion = ooomph
Units of momentum = kg m/s
Derived Impulse = Change in momentum
Several examples of F*t for same change in momentum
Egg toss lab
Force plate demo - flex knees, lock knees
Marshmallow blow gun demo.
Monday, November 8, 2010
Monday, Nov 22, 2010
Go over end of chapter questions, chapter 4: Ex 17, 18, 19, 20, 24, 25, 26, 30, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 44, 48, 49, Prob 8
Go over any questions on Problem sheets
Review for test
Go over any questions on Problem sheets
Review for test
Friday, Nov 19, 2010
Collect RA 6.1 for last time
Go over HW problems. Make sure students follow the problem solving strategy and don't try to take shortcuts by omitting steps.
Two quizzes on inclined plane problems
Did problems 2 and 4 from worksheet.
Test has been rescheduled for Tuesday
Go over HW problems. Make sure students follow the problem solving strategy and don't try to take shortcuts by omitting steps.
Two quizzes on inclined plane problems
Did problems 2 and 4 from worksheet.
Test has been rescheduled for Tuesday
Thursday, Nov 18, 2010
Many students had difficulty with the homework problems. Rather than just go over them, I did two sample problems on the board, similar to Problem 45 in the homework, always emphasizing the problem solving strategy. After that, I set up problem 48 and students worked out the answer.
I gave the students the rest of the period to work on either the HW problems from last night or problems 2 and 4 from the front side of the HW packet.
I gave the students the rest of the period to work on either the HW problems from last night or problems 2 and 4 from the front side of the HW packet.
Wednesday, Nov 17, 2010
Go over Problems 3,8,9,14,24 from Applying Newton's Laws worksheet.
It is important to follow the problem solving strategy, draw the free-body diagram, from the free-body diagram write Newton's second law, and then do the math.
Force plate demo: Ask students to predict what the Force vs Time graph would look like for someone jumping up into the air. Sketch predictions on whiteboard.
Do demo - discuss.
Go over elevator problems on whiteboard.
Do football problem with angles. Show that applying upward as well as forward force decreases normal force and allow the player to knock the other over more easily. Showed graph of acceleration vs angle for various coefficients of friction.
Applications of Newton's Laws Worksheet. Work problems 2,4.
Assigned 42, 43, 44, 45, 48 on back side for tomorrow.
Last day to hand in CD 6 is Friday.
Students were having lots of problems with the problem solving strategy for Newton's Laws. I think I will postpone the test until next week instead of Friday.
It is important to follow the problem solving strategy, draw the free-body diagram, from the free-body diagram write Newton's second law, and then do the math.
Force plate demo: Ask students to predict what the Force vs Time graph would look like for someone jumping up into the air. Sketch predictions on whiteboard.
Do demo - discuss.
Go over elevator problems on whiteboard.
Do football problem with angles. Show that applying upward as well as forward force decreases normal force and allow the player to knock the other over more easily. Showed graph of acceleration vs angle for various coefficients of friction.
Applications of Newton's Laws Worksheet. Work problems 2,4.
Assigned 42, 43, 44, 45, 48 on back side for tomorrow.
Last day to hand in CD 6 is Friday.
Students were having lots of problems with the problem solving strategy for Newton's Laws. I think I will postpone the test until next week instead of Friday.
Tuesday Nov 16, 2010
Stamped homework, RA 4.4.
Went around room asking what students learned from Friday's class. Wrote answers on board.
Went over worksheet as a review of Monday's demos.
Collected RA 4.4 and any CD 6.
Showed clips from Independence Day video. Physics is everywhere...except Hollywood. Hollywood does not understand Newton's 3rd Law. Showed results of calculations for reaction force.
Suppose you have a jar of flies on an electronic balance and all the flies are sitting on the bottom. How would the scale reading change if the files took off and few around the jar. Referred to finger in water demo - the scale reading would not change.
Demo with flying saucer on force plate - same reading when it is resting on plate as when it is hovering above it.
Read Horse Sense.
Showed that it is not possible to apply a force of 200 N to a piece of paper held in front of you. We estimated the mass, time, distance and calculated the acceleration and force - much less than 1 N.
Go over kicking football problem.
Applications of Newton's Laws Worksheet. Work problem 3 on front after giving students a chance to think about it. Students did a similar problem but with different masses for the blocks.
Applying Newton's Laws Worksheet. Assigned problems 3,8,9,14,24
Went around room asking what students learned from Friday's class. Wrote answers on board.
Went over worksheet as a review of Monday's demos.
Collected RA 4.4 and any CD 6.
Showed clips from Independence Day video. Physics is everywhere...except Hollywood. Hollywood does not understand Newton's 3rd Law. Showed results of calculations for reaction force.
Suppose you have a jar of flies on an electronic balance and all the flies are sitting on the bottom. How would the scale reading change if the files took off and few around the jar. Referred to finger in water demo - the scale reading would not change.
Demo with flying saucer on force plate - same reading when it is resting on plate as when it is hovering above it.
Read Horse Sense.
Showed that it is not possible to apply a force of 200 N to a piece of paper held in front of you. We estimated the mass, time, distance and calculated the acceleration and force - much less than 1 N.
Go over kicking football problem.
Applications of Newton's Laws Worksheet. Work problem 3 on front after giving students a chance to think about it. Students did a similar problem but with different masses for the blocks.
Applying Newton's Laws Worksheet. Assigned problems 3,8,9,14,24
Monday Nov 15, 2010
Hand back and go over Newton's Laws test
Test Friday on harder Newton's 2nd Law Problems and Newton's 3rd Law Problems
Newton's 3rd Law introductory lecture:
Inanimate objects can exert elastic forces: demo with rubber band, laser beam on wall.
No such thing as an isolated force - forces come in pairs (pears)
Newton's 3rd law recipe: A acts on B, B acts on B
Demo with finger in water.
Demo with force sensors. A can't pull harder on B than B pulls on A.
Newton's 3rd Law: If object A exerts a force on object B, then B exerts a force on A that is equal in magnitude and opposite in direction.
Tug-of-War: A and B. The one who wins the tug-of-war is the person who pushes harder against the ground.
Action/Reaction forces never cancel out because they do not act on the same object. Because they do not act on the same object, they never appear in the same free body diagram.
Examples of action reaction pairs. Contrast with forces that are equal in magnitude but opposite in direction but are NOT action reaction pairs.
Action and Reaction for Different Masses: If you drop a ball, why does the ball fall down and not the Earth fall up? Same magnitude force = m A = M a. Ball has much less mass so it has larger acceleration. Earth has huge mass, tiny acceleration.
Magic tube: tube exerts upward force on ball, ball exerts downward force on tube. We can measure this extra force using a force sensor and, if the ball is falling at terminal velocity, determine the weight of the ball.
Hand out RA 4.4 due tomorrow
Hand out CD 6.1 due Friday for the last time
Test Friday on harder Newton's 2nd Law Problems and Newton's 3rd Law Problems
Newton's 3rd Law introductory lecture:
Inanimate objects can exert elastic forces: demo with rubber band, laser beam on wall.
No such thing as an isolated force - forces come in pairs (pears)
Newton's 3rd law recipe: A acts on B, B acts on B
Demo with finger in water.
Demo with force sensors. A can't pull harder on B than B pulls on A.
Newton's 3rd Law: If object A exerts a force on object B, then B exerts a force on A that is equal in magnitude and opposite in direction.
Tug-of-War: A and B. The one who wins the tug-of-war is the person who pushes harder against the ground.
Action/Reaction forces never cancel out because they do not act on the same object. Because they do not act on the same object, they never appear in the same free body diagram.
Examples of action reaction pairs. Contrast with forces that are equal in magnitude but opposite in direction but are NOT action reaction pairs.
Action and Reaction for Different Masses: If you drop a ball, why does the ball fall down and not the Earth fall up? Same magnitude force = m A = M a. Ball has much less mass so it has larger acceleration. Earth has huge mass, tiny acceleration.
Magic tube: tube exerts upward force on ball, ball exerts downward force on tube. We can measure this extra force using a force sensor and, if the ball is falling at terminal velocity, determine the weight of the ball.
Hand out RA 4.4 due tomorrow
Hand out CD 6.1 due Friday for the last time
Thursday, November 4, 2010
Monday, Nov 8, 2010
Review for test
Students worked analytic statics problem, 2 graphical statics problem, 2 worksheets on Newton's Laws, and then did the Quia quizzes
Students worked analytic statics problem, 2 graphical statics problem, 2 worksheets on Newton's Laws, and then did the Quia quizzes
Friday, October 29, 2010
Friday, Nov 5, 2010
Hand back Air Resistance Labs and go over.
Go over questions at end of chapter.
Allow students to work on worksheets, CD 5.1, Newton's Laws Problems
Answer questions on worksheets.
Go over questions at end of chapter.
Allow students to work on worksheets, CD 5.1, Newton's Laws Problems
Answer questions on worksheets.
Thursday, Nov 4, 2010
Collect Air Resistance Labs
Go over RA 4.3
Fan Cart demo - calculate coefficient of rolling friction
Handed out Newton's Laws Problem sheet. Students worked on prob 11, pushing car out of mud. Told story of pulling up pine tree.
Went over elevator problems.
Handed out CD 5.1
HW: Work on Newton's Laws Problem sheet, CD 5.1
Tomorrow: Go over questions at end of chapter, and answer any questions on worksheets.
Go over RA 4.3
Fan Cart demo - calculate coefficient of rolling friction
Handed out Newton's Laws Problem sheet. Students worked on prob 11, pushing car out of mud. Told story of pulling up pine tree.
Went over elevator problems.
Handed out CD 5.1
HW: Work on Newton's Laws Problem sheet, CD 5.1
Tomorrow: Go over questions at end of chapter, and answer any questions on worksheets.
Wednesday, Nov 3, 2010
Showed Hewitt 2nd Law video
Collected RA 4.3
Air Resistance Lab write-up due tomorrow
Collected RA 4.3
Air Resistance Lab write-up due tomorrow
Tuesday, Nov 2, 2010
Handed out RA 4.3 due tomorrow
Answered questions on APS Packets
Collected APS Packets
Reviewed Contact Friction
Showed parachute example on board (from Hewitt video)
Students did Air Resistance Lab - due Thursday
Answered questions on APS Packets
Collected APS Packets
Reviewed Contact Friction
Showed parachute example on board (from Hewitt video)
Students did Air Resistance Lab - due Thursday
Monday, Nov 1, 2010
Asked if there were questions on APS Newton's 2nd Law packet.
The packet is due tomorrow
Did Friction Lab in IB way.
Solved a problem using coefficient of friction.
The packet is due tomorrow
Did Friction Lab in IB way.
Solved a problem using coefficient of friction.
Thursday, October 28, 2010
Friday, Oct 29, 2010
Quiz on Inertia
Quiz on Graphical Statics
Quiz on Analytic Statics
Go over RA 4.2
Hand out APS 2nd Law packet.
Went over quickly.
Previewed bowling lab in hallway and smoke ring cannon.
Quiz on Graphical Statics
Quiz on Analytic Statics
Go over RA 4.2
Hand out APS 2nd Law packet.
Went over quickly.
Previewed bowling lab in hallway and smoke ring cannon.
Wednesday, October 27, 2010
Thursday, Oct 28, 2010
Handed back Statics Lab
Answered questions on lab
Graphical solution of statics problems
Students did practice problem
Analytic solution of statics problems
Students did practice problem
Handed out worksheet on statics problems. Students worked the 4 examples
Tomorrow: Quiz on Inertia, Quiz on Graphical Statics, Quiz on Analytic Statics
Answered questions on lab
Graphical solution of statics problems
Students did practice problem
Analytic solution of statics problems
Students did practice problem
Handed out worksheet on statics problems. Students worked the 4 examples
Tomorrow: Quiz on Inertia, Quiz on Graphical Statics, Quiz on Analytic Statics
Monday, October 25, 2010
Tuesday, Oct 26, 2010
Went around the room and asked what the students told their parents about yesterday's class.
Handed back RA 4.1 and went over it.
Newton's First Law - An object at rest will remain at rest and a moving object will continue moving in a straight line with constant speed unless acted on by an outside net force.
Showed the students that a mass of 1 kg weighs 10 N on Earth.
Mass is NOT the same as weight.
Weight = mass * acceleration of gravity = mg = gravitational force of Earth on object
Weight is a force measured in Newtons.
Normal force = force perpendicular to the surface = FN or N
Introduced free-body diagrams - a picture that shows ONLY the forces that act ON an object. Went over Free-Body Diagram worksheet.
Tomorrow we will do the Statics Lab.
Handed back RA 4.1 and went over it.
Newton's First Law - An object at rest will remain at rest and a moving object will continue moving in a straight line with constant speed unless acted on by an outside net force.
Showed the students that a mass of 1 kg weighs 10 N on Earth.
Mass is NOT the same as weight.
Weight = mass * acceleration of gravity = mg = gravitational force of Earth on object
Weight is a force measured in Newtons.
Normal force = force perpendicular to the surface = FN or N
Introduced free-body diagrams - a picture that shows ONLY the forces that act ON an object. Went over Free-Body Diagram worksheet.
Tomorrow we will do the Statics Lab.
Wednesday, October 6, 2010
Wednesday, Oct 6, 2010
Students worked sample problems on calculations for Rocket Lab 2.
Ball and Ramp Projectile Competition.
Went over what is required for Rocket Lab 2 write-up.
Students had a little time to work on their Rocket Lab 2 calculations.
If I can get the laptops, we will do an Excel Spreadsheet exercise tomorrow.
Ball and Ramp Projectile Competition.
Went over what is required for Rocket Lab 2 write-up.
Students had a little time to work on their Rocket Lab 2 calculations.
If I can get the laptops, we will do an Excel Spreadsheet exercise tomorrow.
Tuesday, Oct 5, 2010
Went over Vector Worksheet 3
Students did Vector Worksheet 4
Went over calculations for Rocket Lab 2
Students did Vector Worksheet 4
Went over calculations for Rocket Lab 2
Monday, Oct 4, 2010
Vector worksheet 1
Vector worksheet 2
Started vector worksheet 3 - asked students to finish it for homework.
Vector worksheet 2
Started vector worksheet 3 - asked students to finish it for homework.
Thursday, Sept 30, 2010
Collected RA 3.1
Went over Linear Motion test.
Showed Hewitt video on Projectile Motion.
Went over Linear Motion test.
Showed Hewitt video on Projectile Motion.
Wednesday, September 29, 2010
Tuesday, September 21, 2010
Wednesday, Sept 22, 2010
Allow students time to check Rocket 1 calculations
Review Sus-it-out and equation methods
These are great but don't give an intuitive feel
In the rocket lab, you shot the rocket in the air. What is the acceleration of the rocket at the top of its trajectory? Not really intuitive from other methods.
Bike and Bees
Visualize it
Graphs
Go over graphical method of solving equations.
Hand out problems solving strategy sheet
Give out RA 2.5, due Thursday.
Review Sus-it-out and equation methods
These are great but don't give an intuitive feel
In the rocket lab, you shot the rocket in the air. What is the acceleration of the rocket at the top of its trajectory? Not really intuitive from other methods.
Bike and Bees
Visualize it
Graphs
Go over graphical method of solving equations.
Hand out problems solving strategy sheet
Give out RA 2.5, due Thursday.
Monday, September 20, 2010
Monday, Sept 20, 2010
Reviewed Sus-It-Out Method
Went over RA 2.2, 2.3
Collected CD 2.2
The sus-it-out method is the method students will use for Rocket 1 analysis. Hopefully we will do the Rocket 1 Lab tomorrow - weather permitting.
Asked if students wanted to do Quia review of topics or push ahead. Students chose to push ahead. Derived equations for Equation Method. Handed out worksheet for Linear Motion Problems. Asked students to try enough to be confident of their problem solving abilities, but especially do problems 17 and 18 on rockets.
Went over RA 2.2, 2.3
Collected CD 2.2
The sus-it-out method is the method students will use for Rocket 1 analysis. Hopefully we will do the Rocket 1 Lab tomorrow - weather permitting.
Asked if students wanted to do Quia review of topics or push ahead. Students chose to push ahead. Derived equations for Equation Method. Handed out worksheet for Linear Motion Problems. Asked students to try enough to be confident of their problem solving abilities, but especially do problems 17 and 18 on rockets.
Friday, Sept 17, 2010
Full lecture on linear motion
Went over calculations with constant velocity
Discussed acceleration
Went over sus-it-out method
Did How Fast? How Far? problems
Handed out RA 2.2, 2.3
Handed out CD 2.2
Students worked on them a bit in class.
Went over calculations with constant velocity
Discussed acceleration
Went over sus-it-out method
Did How Fast? How Far? problems
Handed out RA 2.2, 2.3
Handed out CD 2.2
Students worked on them a bit in class.
Thursday, Sept 16, 2010
Finished skills - including dealing with uncertainties
Showed how to deal with uncertainties for:
1. multiple measurements
2. adding and subtracting values
3. Max Min method and Method of Relative Uncertainties.
Handed out math problem worksheet
Students can get up to 5 points extra credit for these problems.
Showed how to deal with uncertainties for:
1. multiple measurements
2. adding and subtracting values
3. Max Min method and Method of Relative Uncertainties.
Handed out math problem worksheet
Students can get up to 5 points extra credit for these problems.
Wednesday, September 15, 2010
Wed, Sept 15, 2010
Skills needed for physics
Showed two-balloon experiment
Minimize surface area: A sphere is the shape that minimizes the surface area for a given volume.
Students calculated the volume and surface area for a cube of side length 1
Students calculated the volume, radius, and surface area for sphere of same volume.
Exercise in using a calculator.
Went over graphs - elements of a good graph
Handed out APS sheet for graph
Handling BIG and small numbers:
Scientific notation
Different units (like light year or AU)
Prefixes - STUDENTS MUST KNOW THE BASIC METRIC PREFIXES
Handed out APS sheet on BIG and small numbers
More pitfalls in using a calculator
Unit conversions
Went over unit conversion explanatory sheet
Students worked on unit conversion worksheet.
If they didn't finish, finish tomorrow for homework.
Showed two-balloon experiment
Minimize surface area: A sphere is the shape that minimizes the surface area for a given volume.
Students calculated the volume and surface area for a cube of side length 1
Students calculated the volume, radius, and surface area for sphere of same volume.
Exercise in using a calculator.
Went over graphs - elements of a good graph
Handed out APS sheet for graph
Handling BIG and small numbers:
Scientific notation
Different units (like light year or AU)
Prefixes - STUDENTS MUST KNOW THE BASIC METRIC PREFIXES
Handed out APS sheet on BIG and small numbers
More pitfalls in using a calculator
Unit conversions
Went over unit conversion explanatory sheet
Students worked on unit conversion worksheet.
If they didn't finish, finish tomorrow for homework.
Tuesday, Sept 14, 2010
Finish Textbook Scavenger Hunt
HW: Tell parents about something interesting from textbook scavenger hunt.
HW: Tell parents about something interesting from textbook scavenger hunt.
Monday, September 13, 2010
Monday, Sept 13, 2010
Stamped Textbook Scavenger Hunt papers that students did not hand in last time.
Handed back papers that students did hand in.
Went over Textbook Scavenger Hunt
Collected RA 1
HW: Tell parents something interesting from today's class
Handed back papers that students did hand in.
Went over Textbook Scavenger Hunt
Collected RA 1
HW: Tell parents something interesting from today's class
Friday, September 10, 2010
Friday Sep 10, 2010
Collect Parent Notification Forms
Collect Course Evaluation Forms
Check for Textbook Covers
Quick Room Tour
Quiz next time on Class Policies
Show meeting place for emergency evacuation
Students work on Textbook Scavenger Hunt in class
RA Chapter 1 for homework
Collect Course Evaluation Forms
Check for Textbook Covers
Quick Room Tour
Quiz next time on Class Policies
Show meeting place for emergency evacuation
Students work on Textbook Scavenger Hunt in class
RA Chapter 1 for homework
Thursday, September 9, 2010
Thurs Sep 9, 2010
Start of New School Year!!
BULA!
Seating chart, student profile.
Went over my background.
Got textbooks
Students wrote name in books
Bring covered textbook tomorrow for 10 pts
Course Expectations - bring in signed form tomorrow for 5 pts
Parent Notification - bring one signed form tomorrow for 10 pts
Magic Jar demo
Students tried if they could float paperclip or penny. Paper clips worked, pennies did not.
Tomorrow must do classroom tour and show emergency meeting place.
BULA!
Seating chart, student profile.
Went over my background.
Got textbooks
Students wrote name in books
Bring covered textbook tomorrow for 10 pts
Course Expectations - bring in signed form tomorrow for 5 pts
Parent Notification - bring one signed form tomorrow for 10 pts
Magic Jar demo
Students tried if they could float paperclip or penny. Paper clips worked, pennies did not.
Tomorrow must do classroom tour and show emergency meeting place.
Monday, February 8, 2010
Monday Feb 8, 2010
Handed back and went over final exam on Newton's 2nd and 3rd Laws
Introductory lecture on Impulse and Momentum
Content Objectives:
Student will be able to
. Define impulse and momentum
. Give the correct units for impulse and momentum
. Calculate impulse and momentum
. State that impulse = change in momentum
. Describe several real-life examples using impulse = change in momentum
. Explain why impulse is greater in bouncing than in sticking
Handed out RA 5.1 due Wed
Assigned Quia Quiz 5.1-15 Random - REQUIRED QUIZ - do by Wed and get 100% correct
Introductory lecture on Impulse and Momentum
Content Objectives:
Student will be able to
. Define impulse and momentum
. Give the correct units for impulse and momentum
. Calculate impulse and momentum
. State that impulse = change in momentum
. Describe several real-life examples using impulse = change in momentum
. Explain why impulse is greater in bouncing than in sticking
Handed out RA 5.1 due Wed
Assigned Quia Quiz 5.1-15 Random - REQUIRED QUIZ - do by Wed and get 100% correct
Thursday, January 21, 2010
Thursday, Jan 21, 2010
Went over HW problems 3,8,9,14,24,42 on Applying Newton's Laws worksheet (back side)
Students did problem 43
Students tried problem 45a and then I worked it on the board
Assigned 44, 45b, 48 for homework
Handed out CD 5.2 - Students worked on it in class
Students did problem 43
Students tried problem 45a and then I worked it on the board
Assigned 44, 45b, 48 for homework
Handed out CD 5.2 - Students worked on it in class
Wednesday, January 20, 2010
Tuesday, Jan 19, 2010
Answered questions on RA 4.4 from Block 1 and then collected it.
Collected any CD 6.1
Did fan cart demo/expt and had students calculate the friction force and coefficient of rolling friction
Had students look at 5 block 3rd law problem and went over it
Assigned problems from back of Applying Newton's Law worksheet - first six circled
Students should bring textbooks to class next period to review end of chapter questions and problems. We will also go over some of the problems from the worksheets.
Collected any CD 6.1
Did fan cart demo/expt and had students calculate the friction force and coefficient of rolling friction
Had students look at 5 block 3rd law problem and went over it
Assigned problems from back of Applying Newton's Law worksheet - first six circled
Students should bring textbooks to class next period to review end of chapter questions and problems. We will also go over some of the problems from the worksheets.
Friday, January 15, 2010
Thursday, Jan 14, 2010
Reviewed Newton's 3rd Law from last class
Examples of punching paper and kicking ball
Horse Sense worksheet and drawing competition
Collected RA 4.4 from Block 1
Answered questions on Newton's Laws Worksheets
Allowed students time to work on RA 4.4 (Block 1), Finish CD 5.1 (due today), work on CD 6.1 (new today, due next Friday), or work on problems from Newton's Laws Worksheets
Examples of punching paper and kicking ball
Horse Sense worksheet and drawing competition
Collected RA 4.4 from Block 1
Answered questions on Newton's Laws Worksheets
Allowed students time to work on RA 4.4 (Block 1), Finish CD 5.1 (due today), work on CD 6.1 (new today, due next Friday), or work on problems from Newton's Laws Worksheets
Tuesday, Jan 12, 2010
Lecture/Demos on Newton's 3rd Law
Handed out Reading Assignment to Block 4 (forgot for block1)
Handed out Reading Assignment to Block 4 (forgot for block1)
Friday, January 8, 2010
Friday, Jan 8, 2010
Collected Air Resistance Labs - Had students make sure they had their names, partner(s) names, Title of Lab, and date.
Collected, graded, and handed back CD 5.1 for those that turned it in. These are do for the last time next Thursday
Content Objectives:
Student will be able to:
. Correctly draw free-body diagrams for "complicated" situations
. Use the problem solving strategy to solve Newton's Laws problems with inclined planes and coefficients of friction
Homework: at a minimum, do problems 3,7,8,9 on the Newton's Laws - Practice Problems worksheet
Handed out Free-Body Diagram worksheet. Students worked on it and then we went over it in detail as a class
Handed out problem solving strategy guide sheet for Newton's Laws
Solved a problem using the problem solving strategy. A block started at rest and slid down an inclined plane with friction. Given the mass, angle of incline, distance it slid down, and coefficient of friction, we solved for the time it took and the speed at the bottom.
Handed out two worksheets with problems on Newton's Laws: Newton's Laws - Practice Problems and Applications of Newton's Laws.
Collected, graded, and handed back CD 5.1 for those that turned it in. These are do for the last time next Thursday
Content Objectives:
Student will be able to:
. Correctly draw free-body diagrams for "complicated" situations
. Use the problem solving strategy to solve Newton's Laws problems with inclined planes and coefficients of friction
Homework: at a minimum, do problems 3,7,8,9 on the Newton's Laws - Practice Problems worksheet
Handed out Free-Body Diagram worksheet. Students worked on it and then we went over it in detail as a class
Handed out problem solving strategy guide sheet for Newton's Laws
Solved a problem using the problem solving strategy. A block started at rest and slid down an inclined plane with friction. Given the mass, angle of incline, distance it slid down, and coefficient of friction, we solved for the time it took and the speed at the bottom.
Handed out two worksheets with problems on Newton's Laws: Newton's Laws - Practice Problems and Applications of Newton's Laws.
Wednesday, January 6, 2010
Wednesday, Jan 6, 2010
Content Objectives:
Student will be able to
. State the factors affecting air resistance
. Explain air resistance using a model of pushing aside air molecules
. State the factors affecting contact friction and compare to the factors affecting air resistance
. Describe what is meant by the coefficient of friction and explain how it is determined
. Distinguish between static friction and kinetic friction
Show Hewitt video on air resistance (2nd Law)
Go over any questions on air resistance lab.
Do contact friction lab
Hand out CD 5.1 due Thursday of next week for the last time.
Student will be able to
. State the factors affecting air resistance
. Explain air resistance using a model of pushing aside air molecules
. State the factors affecting contact friction and compare to the factors affecting air resistance
. Describe what is meant by the coefficient of friction and explain how it is determined
. Distinguish between static friction and kinetic friction
Show Hewitt video on air resistance (2nd Law)
Go over any questions on air resistance lab.
Do contact friction lab
Hand out CD 5.1 due Thursday of next week for the last time.
Monday, Jan 4, 2010
Sorry about all the missed blogs.
Handed back and went over Newton's Laws Test
Students did Air Resistance Lab, write-up due Friday.
Handed back and went over Newton's Laws Test
Students did Air Resistance Lab, write-up due Friday.
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