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Homework Help: Newt's 2nd Law-Non-Equilibrium

  1. Dec 2, 2008 #1
    Newt's 2nd Law--Non-Equilibrium

    1. The problem statement, all variables and given/known data
    A student is skateboarding down a ramp that is 6.0m long and inclined at 18 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.6 m/s. Neglect friction and find the speed at the bottom of the ramp.

    [tex]\Delta[/tex]X = 6 meters
    [tex]\theta[/tex]= 18 degrees
    v[tex]_{}o[/tex]= 2.6 m/s
    v[tex]_{}f[/tex]= ?

    2. Relevant equations
    v[tex]_{}f[/tex]2= v[tex]_{}o[/tex]2 + 2ax

    3. The attempt at a solution
    v(f)2= 6.76+ 12a

    I have no idea what I'm doing. Could I get a push in the right direction? Thanks.
  2. jcsd
  3. Dec 2, 2008 #2


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    Gold Member

    Re: Newt's 2nd Law--Non-Equilibrium

    For this problem I'd use the conservation of energy law. You just have to find the height of the ramp and you can write down the equation.
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