Jawabanmu

2014-02-18T18:03:37+07:00
Diket = a = 5 m/s^2
           W= 8kj = 8000J
           s = 20m
Dit = m...?
jawab = W= FxS => W= m x a x s
            m = w/a x s = 8000 / 5 x 20 = 80 Kg
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