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Brainlag Learn / GCSE Physics

Forces, work, elasticity, moments and pressure

Weight and resultant forces, work done, stretching springs and their required practical, moments, levers and gears, and pressure in fluids.

Lessons

  1. Forces, mass and weightWhat a force is, contact and non-contact forces, scalars and vectors, and weight W = mg with gravitational field strength and centre of mass. 20 min, free
  2. Resultant forces and free body diagramsAdding forces along a line, balanced forces, free body diagrams, and (Higher) scale drawings and resolving a force into two components. 25 min, with the Inclined plane simulation, free
  3. Work done and energy transferWork done when a force moves an object, W = Fs, the joule as a newton metre, and why work against friction heats things up. 20 min, Plus
  4. Springs, elasticity and the force-extension practicalElastic and inelastic deformation, F = ke and the limit of proportionality, elastic potential energy ½ke², and the required practical on a spring. 25 min, with the Mass on a spring simulation, Plus
  5. Moments, levers and gearsThe turning effect of a force, M = Fd, the principle of moments for a balanced beam, and how levers and gears multiply forces. 25 min, Plus, Physics only
  6. Pressure in fluidsPressure as force per area, p = F/A with areas in cm², pressure in a column of liquid p = hρg (Higher), upthrust and floating (Higher), and atmospheric pressure. 25 min, Plus, Physics only

Practise and test

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