If we keep adding pulleys to the system the overall mechanical advantage can be increased, making it easier to lift or even lower objects of heavy mass.

With this 5:1 pulley system the user is required to apply an effort of only 20kg to lift the 100kg load. Notice that when the end of the rope is attached directly to the load this usually results in a mechanical advantage with an odd ratio.

When the end of the rope is attached to a fixed anchor point this will normally result in a mechanical advantage with an even ratio.

Diagram showing a pulley system with a 5:1 mechanical advantage

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