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Homework Help: Spring system on an incline

  1. Feb 26, 2009 #1
    1. The problem statement, all variables and given/known data

    A spring is mounted at an angle of 29 degrees on a frictionless incline as illustrated in the figure below. The spring is compressed to 15 cm where it is allowed to propel a mass of 4.6 kg up the incline.


    2. Relevant equations

    All I am really aware of is W=1/2kx2

    But i do not know where to go from there

    3. The attempt at a solution

    Idk..i really need some guidance..THANKS!
  2. jcsd
  3. Feb 26, 2009 #2
    Sorry i forgot the questions!

    (a) If the spring constant is 560 N/m, how fast is the mass moving when leaves the spring?

    (b) To what maximum distance from the starting point will the mass rise up the incline?
  4. Feb 27, 2009 #3


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    Homework Helper

    loosk like a good one for conservation of energy

    at each point teh energy can be in 3 forms

    spring potential energy, kinetic energy & gravitation potential energy

    should know the formulas for each of these think about where they apply
  5. Feb 27, 2009 #4
    i tried that and im not getting the right answer..i figured i would have to find the velocity in x and y before i find THE velocity..but i dont know where to start with that
  6. Feb 27, 2009 #5


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    Homework Helper

    show your working then...

    this should be a 1D problem, set up your coordinate system at the incline

    the Grav Potential will be the only place the angle enters into
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