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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 velocit v with its trajectory running paralel to + ve y-axis and intersecting z-axis at z = a show in the figure. The change in its angular momentum about the origin as it bounces elastically from a wal at y = constant is

A

`mv ahate_x`

B

`2mvahate_x`

C

`ymvhate_x`

D

`2ymvhate_x`

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