GCSE Physics Unit 2 Revision (2)

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Momentum and Collisions

  • Momentum (kg m/s) = mass (kg) x velocity (m/s)
  • The greater the mass of an object and the greater its velocity, the greater its momentum will be.
  • Momentum is a vector quantity, so it has size and direction.
  • Momentum before = momentum after.
  • Momentum is conserved when no external forces act.
  • Forces are what cause changes in momentum.
  • Force acting = change in momentum (kg m/s)/ time taken for change to happen (secs)


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