## What is Kinetic energy?

In physics, the * kinetic energy* (KE) of an object is the

*that it has due to its motion. It is*

**energy***defined*as the work needed for an object of a known

**mass**to

**accelerate**to a given velocity.

## Kinetic energy equation

To calculate **Kinetic energy** we write the equation like this.

$E_k = { 1 \over2} mv {^2}$

## Kinetic energy demo

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

Calculate the **Kinetic energy store** in a car with a **mass** of 850 **Kg** moving at a **velocity** of 3.5 **m/s**.

## 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 meteorite has 8000 **J** of **Kinetic energy**, calculate its **mass** if it has a **velocity** of 20 **m/s**

## Science in context

Anything that is moving has energy in its** kinetic energy store**.

## Have you entered Millies monthly giveaway?

Check out Millies page to find out how to win a prize or check out the shop to buy Fridge Physics merch.