Jawabanmu

2014-04-27T15:27:00+07:00
Ek =  \frac{1}{2}  . m . v²

Ek =  \frac{1}{2} . 40. 10²

Ek = 20 . 100
Ek = 2000 kJ
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2014-04-27T15:28:42+07:00
Energi  Kinetik  = EK

Ek  =
 \frac{1}{2} m   v^{2}

Ek  =
 \frac{1}{2} x 40 x  10^{2}

Ek  = 2000
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