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Finding The Final Velocity

  1. Jun 8, 2009 #1
    1. The problem statement, all variables and given/known data

    A 20kg object is on a 10 m long, 15 degree slope , that has a coefficient of friction that is 0.2 Calculate the time to slide down the final velocity at the bottom

    2. Relevant equations[/b

    Fg=mag
    Fn=Fgcos(theta)
    Fp=Fgsin(theta)
    mu=Ff/Fn
    Fr=MAr

    3. The attempt at a solution

    I have gotten to the Fr=MAr stage, but after that where you substitute for Vf, Vi, S, Ar, and T; I have gotten stuck.

    Any hints or tips would be greatly appreciated, thanks for your time
     
  2. jcsd
  3. Jun 8, 2009 #2

    rock.freak667

    User Avatar
    Homework Helper

    Find the resultant acceleration.
    Find the final velocity with conservation of energy.
    Use v=u+at and find t.
     
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