Brian Cox: Gravity is the force that keeps our feet ... This clip will be relevant for teaching Physics. This topic appears in OCR, Edexcel, AQA, WJEC KS4/GCSE in England and Wales, CCEA GCSE ...

It is constrained by the universal laws of physics. Each tree has to support its mass against the downwards force of Earth's gravity. At the same time, the trees rely on the strength of the ...

His gravitational model showed how Newtonian gravity, which had dominated astronomy and physics for more than ... The L, for lambda, is the symbol used in general relativity to represent the ...