38

Torque

Publisher Summary

This chapter provides an overview on torque. When two equal forces act on a body they cause the body to rotate, and the system of forces is called a couple. The turning moment of a couple is called a torque, T. Torque is a gauge that measures how much force is acting on an object that causes it to rotate. The unit of torque is the Newton meter, Nm. A common and simple method of transmitting power from one shaft to another is by means of a belt passing over pulley wheels that are keyed to the shafts. Typical applications include an electric motor driving a line of shafting and an engine driving a rotating saw.

1. When two equal forces act on a body as shown in Figure 38.1, they cause the body to rotate, and ...

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