Movable Pulley: A pulley that rotates and interprets according to the motion of the pulley or belt. This is usually employed in blocking and tackle programs, which I will make clear later on.
Loafer: A driven wheel that does not transmit electricity by way of a shaft. It spins freely, and most pushed pulleys are connected to other equipment, this sort of as wheels or drives, by means of driveshafts.