Physics

In a relay race the second runner does not start from rest. it covers 100 m in 10 sec, finishing with maximum velocity of 12 m/sec, assuming the constant acceleration, determine his initial velocity. ??

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  1. v = Vo + at
    s = Vo*t + 1/2 at^2

    12 = Vo + 10a
    a = (12-Vo)/10

    100 = Vo*10 + (12-Vo)/20 * 100
    100 = 10Vo + 5(12-Vo)
    100 = 5Vo + 60
    Vo = 8

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