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Simple Friction Problem

  1. Oct 4, 2011 #1
    1. The problem statement, all variables and given/known data

    A hockey puck leaves a player's stick with a speed of 8.30m/s and slides 25.0m before coming to rest.

    Find the coefficient of friction between the puck and the ice.


    2. Relevant equations

    f=μn
    F=ma
    v^2=v_0^2+2a(x-x_0)

    3. The attempt at a solution

    So I've already figured out the acceleration of the puck using the third equation I listed, which came out to be 12.5m/s. Problem is, I can't figure out how to find the mass of the puck. Which I need to know in order to calculate the normal force. Even then, I would still have two variables since I don't know (f) or (μ) where I'm trying to find (μ).

    Help please? :)
     
  2. jcsd
  3. Oct 5, 2011 #2

    SammyS

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    Let the mass be represented by the variable, m. It will cancel out.
     
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