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A ball of mass 3kg moving with a speed o...

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

`150 sqrt(3) N`

B

`50 sqrt(3) N`

C

100 N

D

`75 sqrt(3) N`

Text Solution

Verified by Experts

The correct Answer is:
A

`F = (Delta P)/(Delta t) = (mv cos 30^(@) -(- mv cos 30^(@)))/(Delta t)`
`= (2 mv cos 30^(@))/(Delta t) = (2 xx 3 xx 10 xx sqrt(3))/(0.2 xx 2) = 150 sqrt(3) N`
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