Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

At the end of the 1600s, Newton proposed the universal law of gravitation: that every particle attracts every other particle ...

A strong permanent magnet acts as a simple pendulum, swinging back and forth while hanging from strings. A copper plate underneath the magnet can be moved up to tune the eddy current damping. Swing ...

The 1 kg pendulum is held up to the demonstrator's face and released. Because of conservation of energy, the ball will not swing higher than the height at which it was released (in fact, because ...

Try these quizzes based on GCSE combined science past papers. By working your way through the combined science questions created by experts, you can prepare for your combined science exams and make ...

Optomechanics is the use of laser light to control the motion of mechanical vibrations, usually micrometre- or nanometre-scale resonators. As well as probing micromechanical motion, light can also ...