rotation is a kind of motion & an electric motor is a part of an electric fan for rotating the vanes in the fan ->  the electric motor in the fan causes the vanes in the fan to move  the electric motor in the fan causes the vanes in the fan to move & an example of mechanical energy is an object in motion ->  the electric motor in the fan causes the vanes to have mechanical energy  the electric motor in the fan causes the vanes to have mechanical energy & an electric motor converts electrical energy into mechanical energy -> a fan converts electrical energy into mechanical energy