Physics › Section B · Kinematics in one and two dimensions › Topic B.4
Constant-acceleration equations and problem solving
When acceleration stays constant, four short equations link displacement, velocity, acceleration and time. With them, and a clear problem-solving routine, most straight-line motion problems become a few lines of algebra.
In this topic
- Five quantities and one assumption
- Velocity after a time
- Displacement from the average velocity
- Displacement without the final velocity
- Velocity without the time
- Choosing the right equation
- A problem-solving routine
- Worked example: an electric car
- Worked example: stopping distance
- Scaling and unreasonable results
- Common mistakes to avoid
- Key takeaways
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