Velocity–time graphs (HT ONLY)

A velocity-time graph shows how the velocity of an object changes with time.
The acceleration of the object can be found by calculating the gradient of the graph.
- A steeper gradient means a greater acceleration.
- If the graph is horizontal, then the object is moving at a constant velocity.
The area under a velocity-time graph gives the distance travelled by an object.
- For straight graphs, this can be calculated as the area of multiple triangles and rectangles.
- For curved graphs, this distance can be estimated by counting the squares under the graph.

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