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See-Saw Homework Question

  1. Oct 31, 2006 #1
    Suppose that an adult and a child are balanced on a see-saw. Each person now moves in toward the fulcrum a distance of 0.25m. What effect will this have on the balance of the see-saw?

    Would it even have an effect?? Or would the childs end go to the ground?
  2. jcsd
  3. Oct 31, 2006 #2


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    The best way to answer this question is to imagine there are some numbers. In what relation do the torques produced by the adult and the child have to be for the see-saw to be balanced?
  4. Oct 31, 2006 #3
    The torque has to be equal on both sides to balance the see saw.
  5. Oct 31, 2006 #4
    After applying some numbers, I came to the conclusion that the torque that the child applying would increase, therefore, causing the childs end to lower.
  6. Oct 31, 2006 #5


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    You got it right.
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