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Let vecF be a force acting on a particle...

Let `vecF` be a force acting on a particle having positon vector `vecr. Let vecr` be the torque of this force about the origin then

A

`vecr. vectau = 0 and vecF. vectau ne 0`

B

`vecr. vectau ne 0 and vecF. vectau = 0`

C

`vecr. vectau ne 0 and vecF. vectau ne 0`

D

`vecr. vectau = 0 and vecF. vectau = 0`

Text Solution

Verified by Experts

The correct Answer is:
D
`vectau= vecr xx vecF`
`therefore vectau " is" bot " to both"" "vecr and vecF`.
`thereforevecr.vectau = 0 and vecF . vectau =0`
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