Table of contents |

2 Early Work 3 Force and Levers 4 The Three Classes of Levers |

## Definition

A **lever** is a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force that can be applied to another object. This is also termed mechanical advantage, and is one example of the principle of moments. The principle of leverage can also be derived using Newton's laws of motion and modern statics.

## Early Work

The earliest remaining writings regarding levers are provided by Archimedes (*"Give me a place to stand, and I can move the Earth."*, a remark of Archimedes quoted by Pappus of Alexandria) who formally stated the correct mathematical principle of levers.

## Force and Levers

### An Example

### Principle of the Lever

## The Three Classes of Levers

*Class 1*

### Examples

*Class 2*

### Examples

*Class 3*

### Examples

**See also**: engineering mechanics