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A ball weighing 10g hits a hard surface ...

A ball weighing `10g` hits a hard surface vertically with a speed of `5m//s` and rebounds with the same speed The ball remains in contact with the surface speed The ball remains in contact with the surface for `0.01s` The average force exerted by the surface on the ball is .

A

100N

B

10N

C

1N

D

0.1N

Text Solution

Verified by Experts

`(F_("avg"))t=mv-(-mv)=2mv`
`F_("avg")=(2xx10xx10^(-3)xx5)/(0.01)rArr 10N`
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Knowledge Check

  • A ball weighing 10 gm hits a hard surface vertically speed of 5 m/s and rebounds with the same speed remains in contact with the surface for 0.01 sec. The force exerted by the surface on the ball is:

    A
    100 N
    B
    10 N
    C
    1 N
    D
    4 N

  • A ball of mass 3kg moving with a speed of 100 m/s, strikes a wall at an angle 60^(@) (as shown in figure). The ball rebounds at the same speed and remains in contact with the wall for 0.2 s, the force exerted by the ball on the wall is

    A
    `1500sqrt(3)N`
    B
    `1500 N`
    C
    `300sqrt(3) N`
    D
    `300 N`

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    A
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    B
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    C
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    D
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