Jawabanmu

2014-02-07T17:24:00+07:00
Diketahui = m = 2 kg
                  h = 4 meter
                  g = 10 m/s²
Ditanya = Ep
Ep = m x g x h
2 x 10 x 4 = 80 Joule
2014-02-07T17:51:07+07:00
Ep = m .g.h = 2.10.4 = 80 joule atau 0,08 kj