Question

a) A super ball of mass 0.05kg is dropped from a height of 10 cm above a table top. It bounces off the table and rises to the same height. Sketch the shape of the force exerted on the ball by the table as a function of time. (time vs force). If the superball was in contact with the table for 30 ms, what is the average force exerted on the ball by the table?

b) The superball is replaced with a clay ball of the same size and mass. The ball is released from the same height and sticks to the table. Again, sketch the shape of the force exerted on the ball by the table as a function of time.

c) Calculate the impulse exerted on the clay ball and on the superball and compare the two. Which is larger, or are they both the same? Explain

d) If the collision of the clay ball with the table takes the same time as the collision of the superball, compare the average force exerted by the table on the clay ball to that exerted on the superball. Which is larger or are they the same?

e) Suppose that the clay has twice the mass and is dropped from the same height. Compare the impulse exerted on the ball by the table to that with the smaller clay ball.

f. Suppose that the original clay ball is dropped from twice the height. Compare the impulse exerted on the ball by the table to that for the smaller height.

Answer 1