In physics, a torque (τ) (also called moment (physics)) is a vector that measures the tendency of a force to rotate an object about some axis (center). The magnitude of a torque is defined as force times the length of the lever arm (radius). Just as a force is a push or a pull, a torque can be thought of as a twist. The SI unit for torque is newton meters (N m). In U.S. customary units, it's measured in foot pounds (ft·lbf) (also known as 'pound feet'). The symbol for torque is &… (More on Torque)