(1) P=pgh=1000x10x1pa=10000pa
(2) P2=pgh2=1000x10x0.5=5000pa
当F压＝ps=10000x0.01N=100N FA=100+5N=105N 则 FB=FaxOA/OB=105x40/10=420N
当F压＝ps=5000x0.01N=50N FA=50+5N=55N
则FB=FaxOA/OB=55x40/10=220N
η1=G1h/(G1h+G轮h)=G1/（G1+G轮）
η2=G2h/(G2h+G轮h)=G2/（G2+G轮）
其中G1=FB=220N G2=FB=420N
则η1/η2＝G1x(G2+G轮)/ G2x(G1+G轮)=44/49解得
G轮＝60N
(3)F1=(G1+G轮)/4=(220+60)/4=70N
F2=(G2+G轮)/4=(420+60)/4=120N
N1=G人－F1=500－70＝430N N2=G人－F2=500－120＝380N
N1/N2=43/38