F1=650 H F2=m*g=4000*10=40000 H S2=240 см² S1=?
F1/S1=F2/S2 S1=F1*S2/F2=650*240/40000=3.9 см²
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F1=650 H F2=m*g=4000*10=40000 H S2=240 см² S1=?
F1/S1=F2/S2 S1=F1*S2/F2=650*240/40000=3.9 см²
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