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.

## 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 **gravitational field strength** (9.8 **N/Kg** 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 an elevated object.

## Chilled practice question

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

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

Copy out the question and attempt to calculate the answer before watching the solution. Write down the equation and show all of your working, remember to add the units to your answer, this routine will guarantee you maximum marks in an exam. Mark your solution and correct if needed.

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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