Mechanical energycan be produced in a variety of ways. One fairly early invention doing that job was (and still is) the water wheel: Water wheel image autolinked from 1.bp.blogspot.com. read more
Quick Answer. Mechanical energy is generated from a system and is the sum of the kinetic and potential energy in this system. Mechanical energy is generated when the object in the system is in motion or at a different position compared to a zero energy position. read more
Thermal energy is created from the motion of atoms and molecules within an object. Because thermal energy is created by the movement of particles, it is considered a form of kinetic energy. Thermal energy is related to temperature and heat, but it is not the same thing. read more