One must get the methods of measuring position and time working together if we are to obtain a reliable representation of motion. To that end we have developed a unique system composed of elements ...

Velocity-time graphs show how the velocity (or speed) of a moving object changes with time. These graphs also show if the object is moving at a constant speed or accelerating, decelerating, or still.

The area under the graph can be calculated by: using geometry (if the lines of the graph are straight) counting the squares beneath the line (particularly if the lines of the graph are curved) ...