pendulum, body suspended from a fixed point so that it can swing back and forth under the influence of gravity. Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation, called the period, is constant.

Why we use compound pendulum instead of simple pendulum?

In a simple pendulum, the only physical property of the pendulum that affect its period is its length. ... In a compound pendulum, the object's mass and how that mass is distributed both play a role in determining the period.

Why simple pendulum is not used in clock?

A simple pendulum is a heavy point mass (known as bob) suspended from a rigid support by a massless and inextensible string. No, the pendulum used in pendulum clock is not a simple pendulum because the simple pendulum is an ideal case. We cannot have a heavy mass having the size of a point and string having no mass.