(3) A 0.25-kg superball strikes a wall with a velocity of 8.0 m/s at an angle of
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(3) A 0.25-kg superball strikes a wall with a velocity of 8.0 m/s at an angle of 60 degree. (See figure below.) It bounces off with the same speed and angle. If the ball was in contact with the wall for 0.010 s, what was the average force exerted on the wall by the ball? (4) In a game of pool, the cue ball has an initial velocity of 4.0 m/s before it collides with a stationary eight ball. After the collision, the eight ball moves off with a velocity of 2.5 m/s at an angle of 42 degree from the initial velocity. What are the magnitude and direction of the cue ball?s final velocity? (Assume conservation of momentum and equal masses.) What percent of the system?s kinetic energy is lost in this collision??Explanation / Answer
3) first we will calculate the impulse on the wall
The ball
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