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A surface is hit elastically and normall...

A surface is hit elastically and normally by n bals per unit time, all the balls having the same mass m, and moving with the same velocity v. then the force acting on surface is

A

mun

B

2 mun

C

`(1)/(2)m u^(2)n`

D

`m u^(2)n`

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AAKASH INSTITUTE ENGLISH-LAWS OF MOTION-Assignment (SECTION-A)
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