## What is Gravitational potential energy?

Lifting an object in a gravitational field transfers energy into the objects gravitational energy store. **Gravitational potential energy** is the **energy** an object has due to its height above Earth. The **equation** for **gravitational potential energy** is **GPE = mgh**, where **m** is the **mass** in **kilograms**, **g** is the **acceleration** due to **gravity** (9.8 **N/m ^{2}** on Earth), and

**h**is the

**height**above the ground in

**meters**.

## Gravitational potential energy equation

To calculate **Gravitational potential energy** we use this equation.

$E_p = mgh$

## Gravitational potential energy demo

In this tutorial you will learn how to calculate the **energy** stored in a moving object.

## Chilled practice question

A barrel is lifted onto a shelf 3.5 **m** from the ground. The barrel has a **mass** of 22 **Kg**. Calculate the** energy** in its **G.P.E store**.

## Frozen practice question

A ski lift transfers 11 **KJ** of **energy** into a mans **G.P.E energy store**. The man has a **mass** of 55 **Kg**, calculate the **height** he was elevated.

## Science in context

Lifting an object in a gravitational field transfers **energy **into the objects **gravitational energy store**.

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