Which unit of measurement is used to express torque?

Torque is defined as a measure of the rotational force applied to an object. The standard unit of measurement for torque in the International System of Units (SI) is the Newton-meter (Nm). This unit is derived from applying a force measured in Newtons at a distance measured in meters from the pivot point or axis of rotation.

Foot-pounds (ft-lb) is another common unit for torque, particularly in the United States and in certain engineering applications. It represents the torque produced when a force of one pound is applied at a distance of one foot from the pivot point.

Thus, torque can be expressed in both Newton-meters and foot-pounds, making this choice the correct answer.

In contrast, Joules, Pascals, and Watts are units that apply to different physical quantities. Joules measure energy, Pascals measure pressure, and Watts measure power. Each of these units serves distinct functions in physics and engineering, therefore they are not appropriate for quantifying torque. Understanding these distinctions is crucial for correctly interpreting basic mechanical principles and performing calculations in related fields.