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If there were no air resistance, with what

speed would drops hit the Earth if they fell
from a cloud 1980 m above the Earth’s sur-
face? The acceleration of gravity is 10 m/s2

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1 answer
  1. v = Vi + a t
    Vi = 0
    a = -10
    so v = -10 t

    0 = 1980 + 0 t - (1/2)(10)t^2

    5 t^2 = 1980

    t = 19.9 seconds

    so v = -199 m/s

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