Acceleration

When velocity changes

An interactive lesson with 8 steps, about 7 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Acceleration $a = \Delta v / \Delta t$, measured in m/s². It's the slope of the velocity–time graph.
• Slowing down means the acceleration points opposite to the velocity.
• The area under a velocity–time graph is the displacement.

Steps

1. Spreading out
2. Acceleration
3. Zero to 100
4. At the very top
5. Signs
6. Stop at the line
7. Area under the velocity graph
8. Speed up, then cruise