Learn about and revise speed, distance, time and velocity with GCSE Bitesize Physics.

Distance-time graphs show how the distance travelled by a moving object changes with time.

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

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 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.