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The torque tau on a body about a given p...

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

A

`dvecL//dt` is perpendicular to `vecL` at all instants to time

B

the component of `vecL` in the direction of `vecA` does not change with time.

C

the magnitude of `vecL` does not change with time.

D

`vecL` does not change with time.

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The correct Answer is:
A, B, C, D
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