A=h(mg-Fa)
A=(p*abc*g-p0*g*abc)h=habcg(p-p0)
A=0.4*0.5*0.75*12*(2200-1000)=1980 Дж
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A=h(mg-Fa)
A=(p*abc*g-p0*g*abc)h=habcg(p-p0)
A=0.4*0.5*0.75*12*(2200-1000)=1980 Дж