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How am I wrong ?

  1. Feb 25, 2009 #1
    How am I wrong ??

    1. The problem statement, all variables and given/known data

    A child rides a sled down a hill that desends at an angle of 27.1 degrees to the horizontal. The is 23.1m long.

    A) what is the horizontal component of the childs displacement
    B) what is the vertical component of the childs displacement



    2. Relevant equations

    SOH CAH TOA

    3. The attempt at a solution

    I Found the horizontal component is 20.56m is correct by cos27.1 x 23.1 but when I submitt my answer of 10.53 for the vertical by sin27.1 x 23.1 it says im wrong.
     
  2. jcsd
  3. Feb 25, 2009 #2

    gabbagabbahey

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    Re: How am I wrong ??

    The child slides down the hill:wink:
     
  4. Feb 25, 2009 #3
    Re: How am I wrong ??

    Make sure you're not doing Sin[27.1x23.1]. Also, double check your calculater is in degree mode
     
  5. Feb 25, 2009 #4

    gabbagabbahey

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    Re: How am I wrong ??

    Are you sure about that? Does the final displacement really depend on how fast the child gets there?
     
  6. Feb 25, 2009 #5
    Re: How am I wrong ??

    I dont know how knowing the direction the child is moving matters. The child still moves 10.53m vertically.
     
  7. Feb 25, 2009 #6

    gabbagabbahey

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    Re: How am I wrong ??

    Upwards is positive, so downwards is____?:wink:
     
  8. Feb 25, 2009 #7
    Re: How am I wrong ??

    wow. so simple thank you very much
     
  9. Feb 25, 2009 #8

    gabbagabbahey

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    Re: How am I wrong ??

    No problem; but remember direction always matters when dealing with vectors.:smile:
     
  10. Feb 25, 2009 #9
    Re: How am I wrong ??

    Yeah I miss read the question and edited my post immediately after posting it......
     
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