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.
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