Jawabanmu

2014-03-06T21:33:22+07:00
Ek = 1/2 m v² = 1/2 X 5 X 2² = 10 J
2014-03-06T21:33:59+07:00
1/2.m.v(pangkat2) = 1/2.5.2.2= 2,5x4= 10