Science revision


Kinetic energy

Physics revision

  • Anything that moves has kinetic energy
  • Kinetic energy is energy movement
  • When an object is moving it has energy, this is its kinetic energy
  • Mass and speed depend on somethings kinetic energy
  • The bigger the mass, the faster it will go and therefore will have a bigger kinetic energy
  • Trains, cars, airoplanes and speedboats will have losts of kinetic energy whereas someone pushing a trolley around will only have a small amount
  • Formula:
  • Kinetic energy = 0.5 x mass x speed2 (speed squared)
  • E.g, a car with the mass of 1450kg is travelling at 28 m/s. Its kinetic energy = 0.5 x 1450 x 28 (squared) = 568400
  • If the mass is doubled, the KE is doubles. If the speed doubles the KE quadruples (x4). This is due to the v(squared) in the formula.
  • Stopping distances


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