The magnitude of a force refers to the amount of force applied. Therefore, the correct answer is C. the amount of force.
The magnitude of a force refers to the amount or strength of the force. It is the numerical value that represents the intensity of the force being exerted. To determine the magnitude of a force, you need to measure or calculate the quantitative value associated with it. The magnitude of a force does not depend on the type, motion, or direction of the force, but rather solely on the amount or intensity of the force being exerted. Therefore, the correct answer is C. the amount of force.
