Everything CCEA students need to know about distance-time graphs for GCSE Physics.

Why do you always make a graph in physics lab? It's not just for fun, there is a reason. Here is an example.

The area enclosed by the velocity-time graph, the time-axis and the two coordinates at time instants t 1 to t 2 gives the distance moved by the particle in the time-interval from t 1 to t 2.

The physics of the situation makes it possible to measure either distance or velocity from either type of electromagnetic wave—there are lidar speed sensors and radar range finders.