Jawabanmu

2014-04-18T23:52:39+07:00
Ek = 1/2 m v^2
     = 1/2 .1000 . 36 ^2 = 648kj
2014-04-18T23:54:55+07:00
Jawaban c
ek=1/2x1000x10 pangkat2=500x100=50000=50Kj