Forces

What you'll learn

1. 1

   Imagine pushing a heavy box across the floor. You feel it pushing back — that's a force!

2. 2

   What is a force?

3. 3

   Here's a diagram showing a person pushing a box. The arrow shows the direction of the force.

4. 4

   Let's see what happens when two people push a box from opposite sides.

5. 5

   Drag the arrows to show a net force of 4 N to the right on the box.

6. 6

   Two people push a car from opposite sides. One pushes 200 N left, the other 150 N right. Which way does the car go?

7. 7

   Forces can also change shape. Squeeze a sponge — that's a force squashing it!