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W=0,3kN*100m
W=30
ponieważ pracowano tylko przeciw sile ciężkosci /bo Ek = const/ to
W = Ep = mgh = Q*h =0,3kN* 100m = 30kJ lub inaczej
W = F*h*cos0* = 0,3kN*100m*1 = 30kJ
.......................pozdrawiam