Question

Two vessels have the same base area but different shapes. The first vessels takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same ? Why do the vessels filled to same height give different reading on weighing scale.

Answer 1

(i) As the two vessels have liquid to same height and the vessels have same base area, the force exerted = pressure × base area will be same as pressure = h p g. 

(ii) Since the volume of water in vessel 1 is greater than in vessel (2) the weight of water = volume × density × h, so weight of first vessel will be greater than the water in second vessel.