1）当都装满水时P=pgh,即P=1.0*1000kg/m^3*10N/kg*（6+1）=70000pa
受力面积为0.5*0.5*3.14=0.785
则F=PS=70000*0.785=54950N
2）桶水：G=mg=Vpg=S底hpg
=0.785*1*1000*10=7850N
管水：G=mg=Vpg=S底hpg
=0.015*0.015*3.14*6*1000*10
=42.39N
总水；G桶+G管=7892.39N
3）因为水对木桶的压强过大,超过木桶最大能承受的压强,所以被压破!
不知能否解决楼主的问题!