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Winches and levers are both machines that contribute mechanical advantage.

They work by increasing the moment applied by a force by increasing the distance away that the force is applied.

A moment, is calculated by the magnitude of the force times the distance away it is applied.

Imagine a lever like a seesaw. The closer you sit to the center, the point of rotation, the easier it is for someone else to hold you up. The further out you side, the harder it is for them to hold you up. Further out, the "moment arm" is longer, so you are applying a greater moment.

Winches have their moment center in the middle of the winding mechanism. Instead of winding it by holding the thin central rod, you have an arm sticking out that allows you to create a larger moment. Imagine having a dial where the knob has broken off. Instead of being easy to turn, it becomes very hard.

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Q: How is winch like a lever?
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