A ball of mass 10 gm is dropped on the ground from a height of 10 m. It rebonds to a height of 2.5 m. If the ball is in contact with the ground for 0.01 second then which statement is correct?

Engineering

Physics

Acceleration

Collision

Momentum and Energy Conservation for System of Particles

Question

A ball of mass 10 gm is dropped on the ground from a height of 10 m. It rebonds to a height of 2.5 m. If the ball is in contact with the ground for 0.01 second then which statement is correct?

A

coefficient of restitution between the ground and ball is 1/2

B

impulse force between the ground and ball is 15N

C

impulse force between the ground and ball is $5 \sqrt{2} N$ .

D

coefficient of restitution between the ground and ball is 1/4

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2.5 = e² 10

$e = \sqrt{\frac{2 .5}{10}} = \frac{1}{2}$ .