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An object of m kg with speed of v m s^(-...

An object of m kg with speed of v `m s^(-1)` strikes a wall at an angle `theta` and rebounds at the same speed and same angle. Find the magnitude of change in the momentum of object.

A

`2m v cos theta`

B

`2m v sin theta`

C

0

D

2m v

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The correct Answer is:
A
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