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Homework Help: Law of conservation of enegry and one task

  1. Oct 2, 2005 #1
    Law of conservation of enegry and one task :)

    I must to do it, but I have no ideas about how to do...
    The washer hits on a horizontal surface of an ice under the corner a=60 and jumps aside under the corner b = 30. Factor of a sliding friction of the washer on the ice u = 0,04. Find losses of kinetic energy of the washer at impact. Movement of the washer consider forward.
  2. jcsd
  3. Oct 2, 2005 #2
    What are the units of a and b?
  4. Oct 2, 2005 #3
    Degrees :)
    Someone told me that dp = F * dt, where F is force of friction. Next write law of conservation momentum and energy. And next solve some equtions :)
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