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Energy and power

Learn how work and energy are related, and how the energy of systems can be used to solve problems about motion. Identify situations in which mechanical energy is conserved. Calculate the power of moving objects. This resource consists of a video in six sections with a supporting web page containing background material.

Interactive resource

Gravity

Learn how to calculate the orbits of planets and satellites. Follow Newton's reasoning in deriving his universal gravitation law. Use the conservation of mechanical energy to find the escape velocity for a rocket. Extend these ideas to find the sizes of black holes. This resource consists of a video in eight sections with ...