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

Options

A. mva `bar(i)`
B. 2 mva `bar(j)`
C. `-mva bar(j)`
D. `-2amv bar(i)`

Answer

B