您好!
设甲、乙两物体的密度为ρ,甲的底面积为S1 ,高为h1 ,乙底面积为S2 , 高为h2
P=F/S
=G/ S2
=mg/ S2
=(m1 + m2 )g/ S2
=(ρv1+ρv2 ) g/ S2
=( v1+ v2 ) ρg/ S2
P1 = F/S
=G/ S1
=mg/ S1
=ρv1g/ S1
所以v1 = S1 P1 /ρg
同理：v2= S2 P2 /ρg
所以：P=( v1+ v2 ) ρg/ S2
= （S1 P1 /ρg + S2 P2 /ρg）ρg/ S2
= （S1 P1+ S2 P2）/ S2
希望我的答案您能够满意!谢谢!