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2014-02-26T18:56:34+07:00
5.10.1,2
=50.1,2
=60 J
insya allah benar
2014-02-26T19:23:35+07:00
W= F.S
 F=M.g=5kg.10m/s²=50N
 S=1,2 m
W= 50N . 1,2 m = 60 J