Question

Define efficiency of a lever. ​

Answer 1

Answer:

A lever is a rigid object that is used with an axis to either multiply the mechanical force (effort) or resistance force (load) applied to it. The efficiency of the lever is called mechanical advantage (MA). The greater the mechanical advantage, the less effort required.

Explanation:

Answer 2

Answer:

It is usually the ratio of the power delivered by a mechanical system to the power supplied to it, and, because of friction, this efficiency is always less than one. For simple machines, such as the lever and the jackscrew, the efficiency is the actual load lifted divided by the theoretical force delivered.

Explanation:

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