Coefficient of Friction of a baseball player

  1. Question:
    A baseball player slides into third base with an initial speed of 8.35 m/s. If the coefficient of kinetic friction between the player and the ground is 0.36, how far does the player slide before coming to rest?

    How would I start this problem?? I would use Ff=uFn but it doesn't even give the weight of the player..
    And would I have to use one of the kinematics problems to find the distance? If so, how would I find acceleration or final velocity?
     
  2. jcsd
  3. Hootenanny

    Hootenanny 9,678
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    Perhaps you don't need the mass, try using Newton's second law and see what happens :wink:. And yes, kinematic equations (after using Newton's second law) sounds like a good idea.
     
  4. HallsofIvy

    HallsofIvy 40,682
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    In other words, just write "mg" for the weight of the player and hope the "m" cancels out!
     
  5. How could I use Newton's second law of motion without knowing what any of the variables stand for?
     
  6. Hootenanny

    Hootenanny 9,678
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    I'm sure you do know what the variables stand for. Start by writing out Newton's second law and filling in any information that you know.
     
  7. I got it! Thank you guys so much for helping!! :biggrin:
     
  8. Hootenanny

    Hootenanny 9,678
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    No problem, we didn't really do much anyway!
     
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