Physics — forces, energy, waves

What you'll learn

1. 1

   Imagine pushing a heavy box across the floor. The push you give is a force!

2. 2

   What is a force?

3. 3

   Drag the arrow to show which way you'd push the box to make it move right.

4. 4

   Let's think about a ball rolling on the grass. It slows down. Why?

5. 5

   What force makes a rolling ball stop on grass?

6. 6

   Now imagine you're pushing a shopping trolley. The harder you push, the faster it goes. Show a big force on the number line.

7. 7

   If you push harder on a trolley, what happens to its speed?