What is the purpose of a friction brake?

The purpose of a friction brake is to convert kinetic energy into thermal energy. When a friction brake is applied, it uses friction between two surfaces to slow down or stop the motion of an object. As the moving parts come into contact, kinetic energy, which is the energy of motion, is transformed into thermal energy due to the frictional forces at play. This heat is then dissipated into the surrounding environment, effectively reducing the speed of the object.

This process is crucial for controlling the motion of vehicles, machinery, or any system where it is necessary to slow down or halt movement safely. By understanding the conversion of kinetic to thermal energy, one can appreciate the essential role of brakes in preventing accidents and ensuring proper functioning of mechanical systems.