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A ball released from a height of 20m, hi...

A ball released from a height of 20m, hits the ground and rebounds to a height of 16m. The percentage loss of energy during collision is,

A

0.2

B

0.4

C

0.25

D

0.75

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The correct Answer is:
A
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Knowledge Check

  • A ball released from a height of 20m, hits the ground andrebounds to a height of 16 m. The percentage loss of energy during collision is,

    A
    `20%`
    B
    `40%`
    C
    `25%`
    D
    `75%`

  • A ball of mass 10 gm dropped from a height of 5 m hits the floor and rebounds to a height of 1.25 m. If the ball is in contact with the ground for 0.1s, the force exerted by the ground on the ball is (g = 10 m/ s^(2) )

    A
    0.5 N
    B
    1.5 N
    C
    0.15 N
    D
    2.5 N

  • A ball of mass 10 gm dropped from a height of 5 m hits the floor and reboundsd to a height of 1.25 m. If the ball is in contact with the ground for 0.1 s, the force exerted by the ground on the ball is (g=10 m//s^(2))

    A
    0.5 N
    B
    1.5 N
    C
    0.15 N
    D
    2.5 N

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