Gravitational Fields

A little intro with a bit of text


1. Gravitational Fields

We have evolved to live in a strong gravitational field and this fundamental force is instrumental in the way that galaxies behave and why stars fuse hydrogen and provide the energy for life on Earth.


2. Newton's Law of Gravitation

Newton was a clever chap, not just for his three laws that you should be familiar with, but also for his law of gravitation.


3. Gravitational Field Strength

Little ‘g’ is probably really familiar to you and at the surface of the Earth it has a value equal to 9.81. As you move away from the surface its value decreases (although on the International Space Station where astronauts appear ‘weightless’ the value of ‘g’ is still about 90% of its value on Earth).