Newton

Find out 5 things about Newton's life.

What is "Newton's Universal Law of Gravitation", a) in words and b) as a mathematical formula.

What is "big G"?

Why don't we notice masses attracting each other?

Why do we weigh less on the Moon?

Kepler's second law says that planets move faster when they are closer to the Sun. How does Newton's law explain this?

The diagram below shows light coming from a torch. B is twice as far away as A.

Explain why the light at B is 1/4 of the brightness (light intensity) of the light at A.

What has this got to do with gravity? What is an "inverse square law"?

A person of mass 80kg has a weight of 800N on the surface of the Earth. What would their weight be if they moved away from the Earth to a distance equal to the Earth's radius?