Class practical: Friction spoils the downhill and uphill experiment of a rolling ball on a curved track. This is Galileo's...

Practical Activity 14-16

Demonstration: When a pendulum is displaced, it stores energy gravitationally due to its increased height. When subsequently...

Practical Activity 14-16

Demonstration: Machines let us move a large force using a small one, but they do not multiply energy. This demonstration...

Practical Activity 14-16

Demonstration: Energy transfers in a simple pendulum illustrate the principle of conservation of energy.

Practical Activity 14-16

It is no real surprise that the world is richer and more complicated than science textbooks make it appear. And it is no...

Practical Activity 14-16

Some ways of talking about energy are clearer and more helpful than others.

Teaching Guidance 14-16

As the son of a Manchester brewer, privately tutored for several years by the chemist John Dalton, James Joule took an early...

Teaching Guidance 14-16

In physics, there is a standard way to work out how much energy has been transferred. It is to calculate the work done in a...

Teaching Guidance 14-16

Multiflash photography creates successive images at regular time intervals on a single frame.

Teaching Guidance 14-16

Energy is conserved. What does this really mean, and why is it true? Water in a reservoir is more or less conserved. So the...

Teaching Guidance 14-16

The next step in this energy story involves recognising that when one energy store empties, another energy store elsewhere...

Physics Narrative 11-14

Richard Feynman, one of the most celebrated 20th century physicists, describes the idea of energy conservation eloquently...

Physics Narrative 11-14