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At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 5.95 m above the water. One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way down with an average angular speed of 2.55 rev/s. Ignore air resistance and determine the number of revolutions she makes while on the way down.

  • physics -

    d = 0.5g*t^2 = 5.95 m.
    4.9t^2 = 5.95
    t^2 = 1.21 s.
    t = 1.10 s.

    2.55rev/s * 1.1s = 2.8 revs.

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