Thursday, Feb 14, 2008 - Valentine's Day

Handed back graded rocket quiz

Solved problems using equations of motion for constant acceleration.
a. Given a distance, find how long and how fast a dropped object is falling.
b. Shoot an object straight up into the air. It is in the air for 2.7 sec. At what time(s) is the object 7 m above the ground?

Answered questions on yesterday's problem worksheet. Solved rock falling by window problem.

Lectured on graphical approach to linear motion problems.
In a velocity vs time graph, the area under the curve gives the displacement.
In a velocity vs time graph, the slope of the curve gives the instantaneous acceleration.

Handed out RA 2.5, due on Friday
WebAssign Chapter 2 part 2 is due tonight
Friday is the last day to hand in CD 2.2
Plan for a test on chapter 2 next Thursday.
No school on Monday - President's Day Holiday.