Learn about and revise free body diagrams, resolving forces, Newton's laws and stopping distances with GCSE Bitesize Physics.

When it comes to measuring the "hardness" of a material, most tests are distinctly low-tech and basically involve pressing a diamond tip into the surface and measuring the size of the dent produced.

KS3 Physics Forces and movement learning resources for adults, children, parents and teachers.

I Used Physics to Calculate How Much Yoda Weighs In The Empire Strikes Back, Luke does a one-armed handstand with Yoda balanced on his foot. Using this, I can estimate the mass of Yoda.