Assignment:
1) A billiard strikes and rebounds from the cushion of a pool table perpendicularly. Mass of the ball is 0.38kg. the ball approaches the cushion with a velocity of +2.1m/s and rebounds with a velocity of -2.0m/s. The ball remains in contact with the cushion for a time of 3.3 x 10^-3 . What is the average net force(magnitude and direction) exerted on the ball by the cushion?
2) A rocket is fired at a speed of 75m/s from the ground level, at an agle of 60 degrees above the horizontal. the rocket is fired toward an 11.0m high wall, which is located 27.0 m away. The rocket attains it;s launch speed in a negligibly short period of time, after which it's engine shuts down and the rocket coasts. By how much does the rocket clear the top of the wall?