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Physics

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A stone is thrown vertically up word by up word by a boy . It returns to his hands in 3sec . How high does the stone rise ?

  • Physics -

    top at 3/2 = 1.5 s = t

    v = Vi - g t
    0 = Vi - g t
    so
    g t = Vi = 9.81 * 1.5 = 14.7

    h = Vi t -4.9 t^2
    = 14.7 *1.5 - 4.9(2.25)
    = 22 - 11 = 11 meters

    note, same as average speed = 14.7/2 times 1.5 seconds

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