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A ball of mass m moving with velocity v,...

A ball of mass `m` moving with velocity `v`, collide with the wall elastically as shown in the figure. After impact the change in angular momentum about `P` is :
.

A

`2 mvd`

B

`2 mvd cos theta`

C

`2 mvd sin theta`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
`J_(i) = mvdcos theta`
`J_(f) = -mvdcos theta`
`Delta_(j) = -2 mvd cos theta`.
.
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