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Homework Help: Physics Problen

  1. Oct 20, 2003 #1
    Given: g=9.81 m/s^2.
    A 41.7 kg child is in a swing that is attached to robes 2.16 m long. Find the gravitional potiental energy associated with the child relative to the child's lowest position under the following conditions:
    B. when the ropes make a 34.7 degree angle with the vertical.

    What equation would I use?
  2. jcsd
  3. Oct 20, 2003 #2


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    Science Advisor

    Well, potential energy = mgh looks good!

    You might also want to draw a picture and use a little trigonometry to determine exactly what h is when the swing makes an angle of 34.7 degrees with the vertical.
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