ABC is an equilateral with O as its centre `vecF_(1), vecF_(2)` and `vecF_(3)` represent three forces acting along the sides AB, BC and AC respectively. If the total torque about O is zero then the magnitude of `vecF_(3)` is :

ABC is an equilateral triangle with O as its centre vec(F_(1)),vec(F_(2)) " and " vec(F_(3)) represent three forces acting along the sides AB, BC and AC respectively. If the torque about O is zero then the magnitude of vec(F_(3)) is

O is the centre of an equilateral triangle ABC . F_(1), F_(2) and F_(3) are the three forces acting along the sides AB, BC and AC respectively. What should be the value of F_(3) so that the total torque about O is zero?

O is the centre of an equilateral triangle ABC . F_(1), F_(2) and F_(3) are the three forces acting along the sides AB, BC and AC respectively. What should be the value of F_(3) so that the total torque about O is zero?

If vecF is the force acting on a particle having position vector vecr and vectau be the torque of this force about the region, then :

A body is under the action of three forces vecF_(1),vecF_(2) and vecF_(3) . In which case the body cannot undergo angular acceleration ? .