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A pulley is a type of simple machine that consists of a grooved wheel and a rope or cable that runs over the wheel. When you pull on one end of the rope, the object on the other end of the rope is lifted or moved with less force required.
Mechanical Advantage (MA)
The mechanical advantage of a pulley is the ratio of the force applied to the rope to the force required to lift or move the object. Increasing the number of pulleys in the system increases mechanical advantage.
Effort in a pulley is the force applied to the rope or chain to lift the load. The mechanical advantage of a pulley system is that it can reduce the amount of effort needed to lift a load.
Lift in a pulley simple machine refers to the weight of the load being lifted. It is equal to the force required to overcome the load's weight and any friction in the system.
Load in a pulley is the object being lifted or moved by the machine. It is the weight that needs to be lifted, moved, or lowered. The load can be reduced by using a pulley system with a mechanical advantage.