What is the definition of torque in mechanical systems?

Torque in mechanical systems is defined as a measure of rotational force applied at a distance from a pivot point or axis of rotation. This concept is crucial in understanding how forces produce rotational effects on objects, such as in engines, gear systems, and other machinery. The effectiveness of torque is influenced by both the magnitude of the force applied and the distance from the pivot point, often referred to as the lever arm. The formula for torque demonstrates this relationship, where torque equals the force multiplied by the distance (lever arm), emphasizing that greater distance results in higher torque for the same applied force.

When considering this definition, it is clear that torque is specifically concerned with rotational forces, distinguishing it from linear measures or pressures. Other provided choices refer to different physical concepts, such as pressure or linear motion, which do not pertain to the rotational aspect that defines torque. By grasping this understanding of torque, individuals can apply this knowledge to various practical applications in mechanical systems, enhancing their performance and efficiency.