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Homework Help: Sliding Ice Block

  1. Nov 13, 2007 #1
    1. The problem statement, all variables and given/known data

    A block of ice at 0°C whose mass initially is m = 50.0 kg slides along a horizontal surface, starting at a speed vo = 5.72 m/s and finally coming to rest after traveling a distance d = 21.37 m. Compute the mass of ice melted as a result of the friction between the block and the surface. (Assume that all the heat generated owing to friction goes into the block of ice.)

    2. Relevant equations
    .5(M initial)V^2 = L * (Mass of ice)
    a=L*(mass of ice)

    3. The attempt at a solution

    .5(50.0)(5.72)^2 = L *(Mass of ice)
    I have all of the information I need to plug numbers into the first equation & solve for mass of ice, yet I don't have L. L is the latent heat of ice, I know that much, but what value do I use.
  2. jcsd
  3. Nov 13, 2007 #2


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    Homework Helper
    Gold Member

    I believe that L_f for water is:

    L_f=334 kJ/kg
  4. Nov 14, 2007 #3
    I tried and I'm still not getting the right answer. Any suggestions?
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