BRAINCAKE

Forces and matter

Edexcel GCSE PhysicsTopic 15 of 1517 lessons

Revision notes for Forces and matter in Edexcel Physics (1PH0). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.

  1. Why changing an object's shape needs more than one forceA single force acting on a free object does not change its shape.
  2. Elastic and inelastic distortionStretching, bending or compressing an object is called distortion.
  3. Force, extension and the spring constantThe extension of a spring is how much longer it gets: the new length minus the original length.
  4. Work done in stretching a springWhen a spring is stretched, work is done on it.
  5. Linear and non-linear force-extension relationshipsIf you plot force on the vertical axis against extension on the horizontal axis, the shape of the graph shows how the object behaves.
  6. Core practical: force, extension and work done for a springAim: to investigate how the extension of a spring depends on the force applied, and to find the work done.
  7. Atmospheric pressure and heightThe Earth is surrounded by a layer of gas called the atmosphere.
  8. Pressure in a fluidA fluid is a liquid or a gas.
  9. Fluid pressure acts at right anglesA fluid is a liquid or a gas, and its particles are always moving randomly.
  10. Pressure, force and areaPressure tells you how concentrated a force is.
  11. Calculating pressurePressure is the force acting normally on a surface divided by the area of that surface.
  12. Fluid pressure, depth and densityThe pressure caused by a liquid depends on how much liquid is above the point you are measuring.
  13. Pressure in liquids: density and depthA liquid is made of particles that are close together and constantly moving.
  14. Calculating pressure in a liquidThe pressure due to a column of liquid is found using the equation pressure = height of column × density of liquid × gravitational field strength…
  15. Upthrust on an object in a fluidA fluid is a liquid or a gas.
  16. Upthrust and weight of fluid displacedWhen an object is placed in a fluid it pushes some of the fluid out of the way.
  17. Floating and sinkingWhether an object floats or sinks depends on the size of the upthrust compared with its weight.

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