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HELP! with homework problem

  1. Jun 3, 2007 #1
    I need help desperatley with this problem.

    Sam (65 kg) takes off (from rest) up a 50 m high, 10° frictionless slope on his jet-powered skis. The skis have a thrust of 160 N. He keeps his skis tilted at 10° after becoming airborne. How far does Sam land from the base of the cliff?

    I believe I'm almost there but I'm stuck towards the end. :frown:

    Any help would be nice.
  2. jcsd
  3. Jun 3, 2007 #2


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    Homework Helper

    Show us what you've done so far, so we can see if you're on the right track. We don't know where you're stuck!
  4. Jun 3, 2007 #3
    I've gotten this far

    acceleration up the slope = .76 m/s^2

    length of slope = 288m

    velocity at the top of the slope = 20.9 m/s

    initial velocity on the x axis = 23.2 m/s

    intial velocity on the y axis = 4.10 m/s

    initial acceleration on the x axis = 2.42 m/s^2

    initial acceleration on the y axis = -7.34 m/s^2

    Now I have no clue what to do.
  5. Jun 4, 2007 #4


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    I get the impression that he starts from rest at the bottom of the slope and accelerates up it until he goes over the top - 50 meters up - then he flies through the air until he reaches the ground again - on the same level that he started out from?
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