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physics

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Mary and John are on opposite sides of a seesaw. Mary has 3x the mass of John. If Mary is sitting at a distance of .5m from the fulcrum, how far must John site in order to keep it balanced.

  • physics -

    John's mass = x kg,
    Mary's mass = 3x kg,
    3x * 0.5 = x * d,
    Solve for d by dividing both sides by x:

    d = 3 * 0.5 = 1.5 m.

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