Our physics expert picks his top-five equations, plus a scheme to supply US power needs with a bucket of baseballs. Thanks, ...

Force diagrams and resultant forces Learn ... more about the difference between motion and speed and how to use the speed equation. Representing journeys Find out how to use distance-time graphs ...

The wave equation is a very important formula that is often used to help us describe waves in more detail. It should be noted that some particular waves have their own specific speeds. The speed ...