An example of a mathematical pendulum in life.

A mathematical pendulum, also known as an oscillator, is not only an ideal model for studying the features of the functioning of oscillatory systems (a small body, whose mass is negligible, is suspended on a long thin inextensible thread). Something similar exists in reality, it is a small ball suspended on a thin long thread. For example, one of the founders of modern physics, Galileo Galilei, studied the work of such a pendulum by observing the oscillations of a church chandelier.