By changing the number and arrangement of the wheels, the mechanical advantage of a pulley system can be increased or decreased. This allows a single person to lift a weight that would be impossible to lift without the system.
Pulley systems are also used to change the direction of a force. For example, a pulley system can be used to change the downward force of gravity into an upward force that can be used to lift an object.
Finally, pulley systems can also be used to change the speed or direction of a moving object. For example, a pulley system can be used to accelerate an object, slow down an object, or change the direction in which an object is moving.
Benefits:
- They can be used to change the direction of a force.
- They can be used to increase or decrease the force required to move an object.
- They can be used to change the speed of an object.
