Stretching or squashing an object can transfer energy into its **elastic potential energy store**.

## What is Elastic potential energy?

Stretching or squashing an object can transfer energy into its **elastic potential energy store**. Elastic energy is the mechanical **potential energy** stored in the material. Elastic energy occurs when objects are compressed, stretched or deformed.

## Elastic potential energy equation

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

$E_e = { 1 \over2} ke {^2}$

## Elastic potential energy demo

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

## Chilled practice question

A spring is stretched 200 **cm**. The spring has a **spring constant** of 30 **N/M**. Calculate the stored **elastic potential energy** of the stretched spring.

## Frozen practice question

Calculate the extension of a spring if it has a **stored elastic potential energy** of 540 **J** and a **spring constan**t of 30 **N/M**.

## Science in context

Stretching or squashing an object can transfer energy into its **elastic potential energy store**.

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