A particle of mass m moving with a veloc...

A particle of mass `m` moving with a velocity `v` strikes a wall and rebounds back. If the magnitude of the velocity is unchanged, the magnitude of the force exerted on the wall by the particle during the time of contact `(t)` will be

A

zero

B

`m v t`

C

`(2 m v)/t`

D

`( m v)/t`.

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