Question

what is a lever? How are the orders of the lever determined?​

Answer 1

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A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types.

The orders of the lever are determined depending on the position of the effort, the fulcrum and the load. Lever of second order: When the fulcrum and effort are situated at the two opposite ends of the lever and a load is placed in between them, we call it a lever of second order.