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How do three classes of levers differ?

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Answer:

They simply differ by the positions of the load and the fulcrum relative to the pivot.

CLASS ONE: fulcrum is in between load and effort.

CLASS TWO: load is in between fulcrum and effort.

CLASS THREE: effort is in between load and fulcrum.

1^st order levers have the fulcrum between the load and effort arms. The mechanical advantage of these levers can be greater or less than 1, depending on the length of the arms.
2^nd order levers have the load portion between the effort portion and the fulcrum. These always have a mechanical advantage greater than 1. They increase the force exerted at the expense of distance.
3^rd order levers have the effort portion between the load portion and the fulcrum. These always have a mechanical advantage less than 1. They decrease the force exerted with a gain to the distance.

First answer by Jinnah ali. Last edit by Jinnah ali. Contributor trust: 4 [recommend contributor ]. Question popularity: 1 [recommend question].

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