Jawabanmu

2014-04-06T14:30:54+07:00
EP = m.g.h
      =5 kg . 10 m/s2. 8 m
      =5 kg . 10 n/kg .8m
      = 400 n.m
      = 400 joule
2014-04-06T14:38:59+07:00
M . g . h
5kg . 8m . 10 m/s2 = 400 joule