Physics › Section B · Kinematics in one and two dimensions › Topic B.3
Acceleration
Any time a velocity changes, whether by speeding up, slowing down or changing direction, there is an acceleration. This topic defines it, explains what its sign means, and clears up the common idea that a negative acceleration always means slowing down.
In this topic
- When velocity changes
- Average acceleration
- Worked example: an electric scooter
- Acceleration is a vector
- Speeding up or slowing down?
- Deceleration is not always negative
- Worked example: four cars, four cases
- Worked example: a ball on a ramp
- Instantaneous acceleration
- Common mistakes to avoid
- Key takeaways
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