Momentum

Posted in AQA GCSE P2, P2: Momentum by Mr A on 31 Jan 2010

  • What is momentum?
  • Applying formula
  • Examples

 

Momentum is a measure of how hard it is to stop something: if an object has a lot of momentum, it will be hard to stop it; if its momentum is low, it will be easy.

 

How much momentum do the following things have? “Loads”, or “not much”?

 

 

Momentum Equation

 

p = mv

  • p = momentum, kg ms^{-1} or Ns
  • m = mass, kg
  • v = velocity, ms^{-1}

 

Worked Examples

  1. What is the momentum of a 70kg person running at 5m/s?
  2. How fast is that same person going if they have a momentum of 210Ns?

 

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