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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

`vec( r ).vec(tau)=0" and "vec(F).vec(tau)=0`

B

`vec( r ).vec(tau)ne0" and "vec(F).vec(tau)ne0`

C

`vec( r ).vec(tau)ne0" and "vec(F).vec(tau)=0`

D

`vec( r ).vec(tau)ne0" and "vec(F)xx vec(tau)=0`

Text Solution

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The correct Answer is:
A
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