Jawabanmu

2014-07-17T19:39:07+07:00
V = 126 km/jam = 35 m/detik
Ek = 30.625
m = ?

Ek =  \frac{1}{2} m v^{2}

m =  \frac{Ek * 2}{ v^{2} }

m = \frac{30625 * 2}{ 35^{2} }

m = 50
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