The opening near the bottom of the vessel shown in figure has an area A. A disk is held against the opening to keep the liquid, from running out. Ket `F_(1)` be the the net force on the disk applied by liquid and air in this case. Now the disk is moved away from the opening a short distance. The liquid comes out and strikes the disk inelastically. Let `F_(2)` be the force exerted by the liquid in this condition. Then `F_(1)//F_(2)` is

Answer

2

Explanation

`F_(1)=rhoghA," "F_(2)=` rate of change in momentum `=rhoAv^(2)=rhoA(sqrt(2gh))^(2)=2rhoghARightarrow(F_2)/(F_1)=2`