Let vec(F ) be the force acting on a particle having position vector vec(r ) and vec(tau) be the torque of this force about the origin. Then

Let vec(F ) be the force acting on a particle having position vector v

1.	Let vec(F ) be the force acting on a particle having position vector vec(r ) and vec(tau) be the torque of this force about the origin. Then
Answer» `vec(R ).vec(F)=0 and vec(r ).vec(TAU) NE 0` `vec( r).vec(tau) ne 0 and vec(F).vec(tau)= 0` `vec(r ).vec(tau) ne - and vec(F).vec(tau) ne-` `vec(r ).vec(tau) = 0 and vec(F).vec(tau)= 0` Answer :D