将2千克水倒入底面积为0.02米2的容器中,水深30厘米.容器重力为2牛,;水平桌面*.求:(1)容器底部受到水的压强;

问题描述:

将2千克水倒入底面积为0.02米2的容器中,水深30厘米.容器重力为2牛,;水平桌面*.求:(1)容器底部受到水的压强;

①p=ρgh                                             
=1.0×103千克/米3×9.8牛/千克×0.3米=2.94×103帕   
F=p S                                                 
=2.94×103帕×0.02米2=58.8牛                      
G=mg=2千克×9.8牛/千克=19.6牛
F=G+ G=19.6牛+2牛=21.6 牛                       
p=F/S                                           
=21.6牛/(0.02米2)=1080帕