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Questions  

Let F¯ be the force acting on a particle having position vector r & T be the torque of this force about the origin.  Then

a
r.T=0 and F.T=0
b
r.T=0 and F.T0
c
r.T0 and F.T=0
d
r.T0 and F.T0

detailed solution

Correct option is A

T=r×F

r·T=0 and F·T=0

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