Everything CCEA students need to know about speed-time graphs for GCSE Physics. ... From 0 to 20 seconds it moves at a constant velocity of 12 m/s. Question.

Velocity-time graphs are similar to speed-time graphs. The following velocity-time graph represents the motion of a bus which travels along a straight road, then returns in the opposite direction.

A velocity-time (v-t) graph represents an object’s velocity (the rate of change in the object’s position) plotted against time. On this graph, the x-axis represents time (t), and the y-axis represents ...

A feature of the relativity theory . . . is the absoluteness of the velocity of light. —Sir Arthur Stanley Eddington. The speed of light is perhaps the most fundamental of all the constants of ...