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Calculating height of a ramp

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data
    A block is shot up a frictionless 40degree slope with intial speed v. It reaches height h before sliding back down. The same block is shot with the same speed up a frictionless 20 degree slope. On this new slope, the block reaches height?


    2. Relevant equations

    1/2 mv^2 I'm not sure how to transfer this equation for speed and height when dealing with angles



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 25, 2008 #2

    tiny-tim

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    Hi girlsnguitars! :smile:

    You don't need speed (except that you want the height at which the speed is zero :wink:).

    Just use KE + PE = constant. :smile:
     
  4. Sep 25, 2008 #3
    @girlsnguitars
    Hi,
    would you mind posting your answer when, or if, you get it? Thanks
     
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