impulse

• impulse is the average force exerted on an object during a collision multiplied by the time for which the force acts
• $impulse=$$Ft$

  • impulse (Ns)
  • force (N)
  • time (s)
• impulse + change in momentum -

  • during collision, force applied to the object causes acceleration
  • impulse is the change in momentum

  $Ft=$$mv-mu$

  • mu- momentum before
  • mv- momentum after
• impulse + change in momentum -

  • impulse is found by area under a force time graph
  • if impulse is constant, but force happens over shorter time then force will be higher
  • in certain collisions long contact times will reduce the force exerted, area under graph stays the same but peak will be lower and time will be longer