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A particle of mass m is moving in YZ-pla...

A particle of mass m is moving in YZ-plane with a uniform velocity `v` with its trajectory running parallel to `+ve` Y-axis and intersecting Z-axis at `z=a` in figure. The change in its angular momentum about the origin as it bounces elastically form a wall at y=constant is

A

`mvabari`

B

`2mvabari`

C

`-mvabari`

D

`-2amvbari`

Text Solution

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The correct Answer is:
B
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