Assignment 21

Problems and experiments address projectiles for which initial vertical velocity is not zero, the effects of dissipative forces, terminal velocity, and elastic and inelastic collisions.

qa problems address projectiles, mostly for cases in which the initial vertical velocity is not zero.

One 'seed' problem considers the effect of air resistance on the velocity of a ball tossed upward then caught at the original point.  Another considers the effect of friction on the velocity of an automobile which coasts up an incline then back down.

The lab exercise you will attempt to determine energy losses as a ball coasts up then down an incline, based on observations of the time required to coast up the incline to rest, then back down the incline to the original position.

Class Notes topics include

• terminal velocity
• momentum conservation in two dimensions
• energy, vectors and projectile motion

Text topics focus on elastic and inelastic collisions in one dimension.