## Moment of Force

### From DT Online

**Archimedes** (c. 287 BC – c. 212 BC) is reputed to have once said *“Give me a place to stand and with a lever I will move the whole world.”*

This is because, when using a **lever**, it is not only the force exerted which matters, but also the distance it is applied from the **Fulcrum** so a small force exerted at the end of a long lever can lift a heavy load.

**Force**multiplied by the distance it is applied from a

**Fulcrum**or other fixed point

*is known as the*

**(F x D)****Moment of a Force**-

*(often shortened to simply*. The

**Moment**)**Force**is measured in

**newtons**and the

**Distance**in metres giving units for a

**Moment of Force**as a

**newton/metre**

*.*

**(Nm)**

**Torque** is a measure of the effort need to turn or twist an object about its axis and so it too is a **Moment of Force** measured in **newton/metres** * (Nm)*.