For a rigid body to be in a state of static equilibrium, what conditions must the net external force and the net external torque satisfy?
Net external force is zero; net external torque is zero.
Net external force is zero; net external torque is non-zero.
Net external force is non-zero; net external torque is zero.
Net external force is non-zero; net external torque is non-zero.
43 exam-style questions on CIE IGCSE Physics 1.5.2a Moment of a force. Each one has a worked solution and a mark scheme showing where the marks go.