Final answer:
Torque is the physical quantity that measures how much force is applied to an object to cause it to rotate. It is given by the equation τ = rF sin(θ) and is a key concept in physics related to rotational motion.
Step-by-step explanation:
The term that measures how much force is applied to an object in order to rotate it is torque. Torque is the rotational equivalent of a force and can be considered the turning or twisting effectiveness of a force. It is vital in understanding how levers and rotational systems work. According to physics principles, the magnitude of torque (τ) is given by the equation τ = rF sin(θ), where r represents the radius at which the force is applied, F is the force applied, and θ (theta) is the angle between the force applied and the lever arm.