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The torque vec tau on a body about a giv...

The torque `vec tau` on a body about a given point is found to be equal to `vec A xx vec L` where `vec A` is a constant vector and `vec L` is the angular momentum of the body about the point. From this its follows that -

A

`(d vec(L))/(dt)` is perpendicular to `vec L` at all instants of time.

B

the components of `vec L` in the direction of `vec A` does not change with time.

C

the magnitude of `vec L` does not change with time

D

`vec L` does not change with time.

Text Solution

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The correct Answer is:
A, B, C
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