PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A rod is hinged at one end. Four equal forces act at the free end, each at the same point but in different directions as described below. Which force will produce zero torque about the hinge?
(a) Perpendicular to the rod
(b) Along the rod away from the hinge
(c) At 30∘ to the rod
(d) At 60∘ to the rod