Latent heat of fusion of ice

  1. A 58.0 kg ice-skater moving at 6.25 m/s glides to a stop. Assuming the ice is at 0°C and that 53.5 percent of the heat generated by friction is absorbed by the ice, how much ice melts?

    Should I first calculate the work? I know I need to use Delta U= Q-W...but what is Delta U in this case?
     
    Last edited: Sep 6, 2005
  2. jcsd
  3. mukundpa

    mukundpa 507
    Homework Helper

    53.5% of the kinetic energy is converted to heat energy which is delta U.
     
  4. How do I find Q given to the ice?
     
  5. HallsofIvy

    HallsofIvy 40,932
    Staff Emeritus
    Science Advisor

    First, calculate the kinetic energy of the skater initially. Since the skater completly loses that energy, it must have gone into heat caused by the friction with the ice.

    Find 53.3% of that and apply that to the "heat of melting" of ice.
     
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