When was the last time you watched a young child playing that favourite game of throwing the toy out of the pram? You know...

Physics Narrative 11-14

It is truly mind-bending that the gravitational force acts between any two objects with mass in the universe.

Physics Narrative 11-14

Physicists use the idea of a field when dealing with forces, such as gravity, that act at a distance with no contact between...

Physics Narrative 11-14

Newton's great achievement was to identify gravity as a force pulling objects (such as the infamous apple) to the ground and...

Physics Narrative 11-14

Suppose you want to calculate the size of the gravitational force acting between you and your colleague as you approach each...

Physics Narrative 11-14

You, or one of your pupils, might pose the question: Yes, but what is gravity? There is certainly a difference between being...

Physics Narrative 11-14

This gives a very brief description of how physicists try and explain gravity, rather than just saying it is there.

Physics Narrative 11-14

One of the consequences of living in a gravitational field, where the force on an object depends on its mass, is that all...

Physics Narrative 11-14

If one object has twice the mass of another the Earth will pull it with twice the force:

Physics Narrative 11-14

Physics Narrative 11-14

The definition of mass in terms of the amount of stuff is the one that is commonly used in school science. Strictly speaking...

Physics Narrative 11-14

Remember that mass does not vary. If you measured the mass of an object here on Earth and on the Moon, you would find it was...

Physics Narrative 11-14