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Homework Help: Finding height given velocities

  1. Jun 22, 2010 #1
    1. The problem statement, all variables and given/known data
    A daredevil on a motorcycle leaves the end of a ramp with a speed of 39.0 m/s as in the figure below. If his speed is 36.7 m/s when he reaches the peak of the path, what is the maximum height in meters that he reaches? Ignore friction and air resistance.
    p5-23alt.gif


    2. Relevant equations



    3. The attempt at a solution
    I don't even know where to begin
     
  2. jcsd
  3. Jun 22, 2010 #2
    When the daredevil reaches the top, his velocity is in the vertical direction is zero........ This means he can't go further up. Gravity will pull him down. Now, I suppose you can find the maximum height he reaches.
     
  4. Jun 22, 2010 #3
    Think about conservation of energy, KEi+PEi=KEf+PEf. You should take your reference as the bike exits the ramp. I hope this is clear.
     
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