Jawabanmu

2014-04-01T20:32:37+07:00
W = F . s
    = 4 N . 2 m
    = 8 Nm
    = 8 Joule
2014-04-01T20:33:40+07:00
W=F×s. W=usaha(J). F=gaya(N). s=perpindahan benda(m). W=F×s=4×2=8J