## Turning Moments

The size of the turning effect is called a **turning** **moment**. As Newton’s first law of motion states, an object will remain at rest if the forces are balanced. When the sum of the forces add to zero, a body will remain at rest or move at a constant **velocity**.

## Demo

In this tutorial you will learn how to calculate the **moments** and apply the results to a real life situation for example forces acting on a see-saw.

The equation for this calculation is written like this:

$M = { \text F \; \text x \; \text D}$

## Chilled practice question

The anticlockwise **moment** is is 75 **Nm**. What distance from the pivot must you place a 2.5 **Kg** mass for the clockwise and anticlockwise moments to equal ? Take gravity as 10N\Kg

## Frozen practice question

You sit 2 **m** away from the pivot on a see-saw and your weight is 500 **N**. Your friend has a mass of 25 **Kg**. How far away from the pivot on the other side should they sit for the see-saw to balance ? Take gravity as 10N/Kg

## Science in context

The size of the turning effect is called a** turning** **moment**.**Turning moment = force x perpendicular distance from the pivo**t.

As Newton’s first law of motion states, an object will remain at rest if the forces are balanced.

When the sum of the forces add to zero, a body will remain at rest or move at a constant **velocity**.