MrBadmusAI

Year 9 · Summer First Half

Physics

3 lessons from 1 unit.

Unit P12 · lessons 1 to 3 of 6

Space

Gravity never switches off and never pushes. Follow it from a bathroom scale that measures newtons and prints kilograms, out to the pull between the Earth and the Sun, and on to a ruler made of light.

  1. 01Gravity and weightQuantitativeBathroom scales are marked in kilograms and measure newtons. That single piece of everyday dishonesty is behind almost every mistake made in this topic.Open this lesson
  2. 02Mass vs weightContrastTwo quantities, two units, one word used for both in ordinary speech. Sorting them out is worth more marks than any other single idea in this unit.Open this lesson
  3. 03Gravity between Earth, Moon and SunModelThe Earth pulls the Moon with two hundred billion billion newtons and the Moon has not moved any closer in four billion years. Both of those statements are true, and understanding why is most of what orbits are.Open this lesson

Back to all three sciences this half term The whole KS3 Physics course