如图所示,一平底玻璃杯,重1.5牛
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1,
P=ρ液gh
=1000*10*0.1
=1000Pa
F=PS
=1000*10*10^-4
=1N
2,
F=G1+G2
=1.5+2.5
=4N
P=F/S
=4/20*10^-4
=2000Pa
