It is thermal energy essentially. According to the laws of thermodynamics, systems become more chaotic (random) as time progresses. They also state that no machine can be 100% efficient and that some energy will always be lost to heat (random kinetic energy).

kinetic energy possessed by system due to random motion of individual particles. Eg: kinetic energy due to vibration of molecules within a solid.

Energy associated with a moving object in motion is called kinetic energy. A more massive object has more energy when it is moving. Similarly the faster an object is moving the more energy it has.

say u have a ball a u let it go down a hill, thats kinetic energy