James and Ellie introduce elastic potential and explain the key equations needed to understand the relationship between forces and extension. ELLIE: Hello and welcome to the BBC Bitesize Physics ...

There are four such forces that ... then physics will have effectively achieved its end. Now the entire physical universe would be encompassed by a set of equations - or perhaps just one equation.

This series of short explainer films with Professor Brian Cox comprises six clips focused on forces, speed and motion ... answers and applying logic to equations, skills that are generic across ...