Pulley System
Definition
A pulley system is a simple machine that consists of a grooved wheel and a rope or cable. It is used to change the direction or magnitude of a force.
Analogy
Imagine you are trying to lift a heavy box onto a shelf, but it's too heavy for you to lift directly. Using a pulley system is like having someone else help you by pulling on the other end of the rope, making it easier for you to lift the box.
Related terms
Mechanical Advantage: The mechanical advantage of a pulley system refers to how much it multiplies the input force.
Fixed Pulley: A fixed pulley is attached to an immovable object and only changes the direction of the force.
Movable Pulley: A movable pulley is attached to the object being lifted and moves along with it, reducing the effort needed.
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