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If vec F is the force acting in a partic...

If `vec F` is the force acting in a particle having position vector `vec r` and `vec tau` be the torque of this force about the origin, then

A

`r. tau ne 0` and `F. tau =0`

B

`r. tau gt 0` and `F. tau lt 0`

C

`r. tau =0` and `F. tau =0`

D

`r. tau =0` and `F. tau ne 0`

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The correct Answer is:
c
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