Question

Describe the principle of action of a simple lever.
In a handpump, the lever is bent at an angle at the
fulcrum and is heavy at the handle end. Explain
the advantage gained by these features.​

Answer 1

Answer:

The lever is a movable bar that pivots on a fulcrum attached to a fixed point. The lever operates by applying forces at different distances from the fulcrum, or a pivot.

Assuming the lever does not dissipate or store energy, the power into the lever must equal the power out of the lever. As the lever rotates around the fulcrum, points farther from this pivot move faster than points closer to the pivot. Therefore, a force applied to a point farther from the pivot must be less than the force located at a point closer in, because power is the product of force and velocity.[6]