Moment about an Axis Clockwise Moment Zero Torque Conditions Moment Arm SI Unit of Torque Perpendicular Force Component Torque of Concurrent Forces Torque of Parallel Forces Moment of a Couple Resultant Torque Principle of Moments Reference Point Dependence Parallel Force Component Vector Nature of Torque Torque Equilibrium Scalar Torque Anticlockwise Moment Dimensional Formula Torque of Coplanar Forces Line of Action Zero Moment Torque Definition Torque Right-Hand Rule Force Direction