Kinematics
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What you'll learn
How to describe motion precisely with speed, velocity and acceleration, and how to read displacement-time and velocity-time graphs to find those quantities and the distance travelled.
- Speed is a number, velocity is a number with a direction
- Displacement is a directed distance from a fixed start point
- Average speed uses total distance and total time
- Uniform acceleration is a steady change in velocity
- A displacement-time graph's gradient is velocity
- A velocity-time graph's gradient is acceleration
- The area under a velocity-time graph is displacement
- Free fall near Earth has a roughly constant acceleration