These graphs also show if the object is moving at a constant speed or accelerating, going back to the starting point, or stationary. Constant speed is shown by a straight rising line. The gradient ...

A horizontal line means the object is moving at a constant speed ... the greater the increase in speed. The area under the graph = the distance travelled. This is a speed-time graph for a car ...

Let me start with a graph. This shows the horizontal acceleration of the pod as a function of time. Here the pod accelerates at 9.8 m/s 2 for 2.6 minutes and then travels at a constant speed.