Jawabanmu

2014-04-29T14:52:09+07:00
W  × lb = F × lk

Km = =  lk
         F      lb
keterangan rumusnya jga isiin dong
w = gaya berat,,,,F = Gaya,,,lk = lengan kuasa ,,,lb = lengan beban,,,km = keuntungan mekanis