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When is the rate of change of momentum equals zero ?

  1. May 9, 2015 #1
    When is the rate of change of momentum equals zero ?
     
  2. jcsd
  3. May 9, 2015 #2
    Well, if the rate of change of momentum is zero, then the momentum is constant (obviously.) That can mean the momentum p = 0 (ie the velocity is zerozero.) Either way, the impulse of a force is related to the change in momentum, therefore there is no force involved if momentum is zero.

    Mathematically:
    Impulse = FΔt = mΔv
    Therefore change in momentum = mΔv/Δt = F
    Therefore the force is zero if there is no change in momentum.

    Hope this helps.
     
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