Question

A 0.5 kg ball drops from a height of 5 metres above ground in vacuum. (No air resistance.)

It rebounds to a height of 4 metres after hitting the ground.
The time of contact with the ground during the bounce back is 10 ms.

(a) Calclate the GPE when it is at 5 metres?
(b) Calculate the KE at the moment it just hits the ground?
(c) Calculate the GPE when it reaches 4 metres after hitting the ground?
(d) Calculate the KE at the moment it is bounces off the ground?
(e) What was the change in momentum of the ball at the time of hitting the ground and the bounce?
(f) What was the contact force that acted on the ball to cause this to happen?

Answer 1

Answer:

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