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A hot-air balloon is rising upward with a constant speed of 3.93 m/s. When the balloon is 4.91 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

  • physics -

    h = -3.93t * 4.9t^2 = 4.91 m.
    4.9t^2 - 3.93t - 4.91 = 0
    Use Quadratic Formula and get:
    t = 1.48 s.

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