Torque is the rotational force.

• A. The linear force
• B. The angular displacement
• C. The rotational force
• D. Velocity

Answer: (C)

Torque is the rotational force that tends to rotate an object about an axis. It’s the rotational counterpart to linear force: a force applied at a distance from a pivot creates a turning effect, and the farther the force is from the pivot (and the larger the force), the stronger that turning tendency. The magnitude of torque is often described by τ = r × F (the lever arm times the force, with direction given by the right-hand rule). The other terms describe motion or rotation itself rather than the cause of rotation: angular displacement is how much rotation occurred, velocity is the rate of motion, and linear force drives linear motion. So describing torque as rotational force captures what causes rotation about an axis.