**Pressure** can be calculated if you know the **force** applied to or by an object and the contact **area**. The units are **newtons** per square meter, or **N/m ^{2}**.

## Demo

In this tutorial you will learn how to calculate the **pressure** exerted by an object if you have been given the **force** applied to the object and given **area**.

The equation for this calculation is written like this:

$P = { \text F \; \text / \; \text A}$

## Chilled practice question

The base of a brief case has an **area** of 25 **cm ^{2}** and a

**mass**of 5

**Kg**. Calculate the

**pressure**exerted by the briefcase when placed on a surface. Take the force of Gravity as 10N/Kg.

## Frozen practice question

An elephant exerts a **pressure** of 53500 **N/m ^{2}** one of its feet has an area of 0.15

**m**. Calculate the

^{2}**mass**of the elephant. Take the force of Gravity as 10N/Kg.

## Science in context

**Pressure** can be calculated if you know the **force **applied and the **area** using the physics equation, **P = F/A**. **Pressure **is equal to **force** divided by **area**, units are newtons per square meter, or **N/m ^{2}**.

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