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Juggling Force

  1. Jun 25, 2007 #1

    A friend of mine recently posed the following riddle:

    You weight 198 lbs, and need to transport three iron balls that weight 1 lb each across a bridge that can only support 200 lbs. How do you do it?

    The proposed answer: Juggle the balls.

    It would seem to me that tossing a 1 lb ball in the air high enough to juggle it would exert more than 2 lbs of downward pressure. What do you think? What would be the relevant equation?

  2. jcsd
  3. Jun 25, 2007 #2


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    Science Advisor

    Do a search for the thread that asks the same question but with a truck that has a bunch of birds.
  4. Jun 25, 2007 #3


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    Staff: Mentor

    No Fred, we've also answered this precise question a few dozen times as well...

    The short answer, istock1, is that you are correct.
    Last edited: Jun 25, 2007
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