Description: Friction energy refers to the energy lost in a mechanical system due to the resistance generated between two surfaces in contact. This resistance, known as friction, occurs when the surfaces slide or attempt to slide over each other. Friction can be static, when the surfaces are not moving, or kinetic, when there is already movement. In both cases, friction converts part of the mechanical energy into heat, resulting in a loss of useful energy in the system. This phenomenon is fundamental in physics, as it affects the efficiency of machines and devices, and is a crucial factor in the design of mechanical systems. Friction is not only an obstacle but can also be harnessed, as in the case of vehicle brakes, where it is used to stop motion. However, in many applications, unwanted friction can lead to premature wear of components and decreased energy efficiency. Therefore, understanding friction energy is essential for optimizing the performance of mechanical systems and improving their durability.