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Velocity of sliding object

  1. Feb 20, 2013 #1
    1. The problem statement, all variables and given/known data
    Block slides down a 1 meter ramp at a 30 degree angle. The coefficient of kinetic friction is 0.4
    what is the block's speed at the bottom of the ramp?


    2. Relevant equations

    kineticFriction force = coefficient of friction X normal Force

    normal Force = force of gravity + mass*acceleration

    3. The attempt at a solution

    I've tried the problem but i get stuck of finding the normal force required to find the kinetic friction force. Can someone guide me a little bit please... thank you in advanced
     
  2. jcsd
  3. Feb 20, 2013 #2
    The normal force and the component of the weight of the block need to cancel each other out.
     
  4. Feb 20, 2013 #3
    solved!! the professor gave us a formula but I copied it wrong... just for reference the formula which gave acceleration was a = g[sinO - UkcosO]
     
  5. Feb 20, 2013 #4
    Physics not about memorizing formulas, it is about deriving them from first principles, so can you?
     
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