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Homework Help: Comparing momentum and impulse of sleds

  1. Dec 18, 2008 #1
    1. The one sled has a mass of 2m and the other sled has a mass of m show that sled one with mass 2m has a momentum of root2 compared to the sled with mass m.

    The only formulas that i could think to use were p=mv and sigmaF=dp/dt and i cant seem to find a way to relate them to get an answer so any help would be nice ty.
  2. jcsd
  3. Dec 18, 2008 #2


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    Was that the entire problem, or were you told anything else about the sleds? For example were their kinetic energies related somehow, or did they tell you something about their motion?
  4. Dec 18, 2008 #3
    their kinetic energies were the same at the finish line
  5. Dec 18, 2008 #4


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    Kinetic energy = 1/2*m*v^2 = 1/2*(m^2*v^2)/m = 1/2*p^2/m
    Use this relation between energy and momentum.
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