Monday, November 24, 2008 - Blocks 1 and 3

Did not hand back Newton's Laws Test. Sub allowed students to go away and come back during lunch and/or after school to finish - something I never allow to happen.

Collected RA 5.1
Introduction to impulse and momentum lesson

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

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.

Handed out RA 5.2 due tomorrow - students had some time in class to work on it.