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Homework Help: Jumping on Phobos problem

  1. Jun 28, 2014 #1
    1. The problem statement, all variables and given/known data
    At the surface of the Martian moon Phobos, the acceleration due to gravity is .001g, where g is the acceleration due to gravity on earth. If you can jump 2 m high on earth, how high can you leap on Phobos? How long would it take you to reach your maximum altitude?

    2. Relevant equations

    3. The attempt at a solution
    I tried to solve this using the kinematic equations so I first tried to find the time at the top of the persons jump by using V = at and then plug that into the equitation x = 1/2at^2. The problem is that the first equation, when I plugged in the numbers I got t = 0.
  2. jcsd
  3. Jun 28, 2014 #2


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    Homework Helper

    Try using conservation of energy.

    To me it seems like you should be able to jump to the same potential energy in either field (because your legs can do the same amount of work)

    I am not 100% sure if this is a valid approach, but it's worth a shot
  4. Jun 28, 2014 #3
    It worked! Thanks!
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