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A body of mass 2 kg collides with a wall...

A body of mass 2 kg collides with a wall with speed 100 m / s and rebounds with same speed. If the time of contact was 1/50 second, the force exerted on the wall is

A

`10^(4)N`

B

`2xx10^(4)N`

C

`4N`

D

`8N`

Text Solution

Verified by Experts

The correct Answer is:
B
According to Newton's second law of motion, the force exerted on the wall is given by
`F= (m(v-u))/(t) = (2[100-(-100)])/((1)/(50)) = 100 xx 200`
`therefore F= 2xx10^(4)N`
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