two vessels A and B of different shapes have the same base area and filled with water up to the same height h . the force exerted by water on the base is Fa for vessel A and Fb for vessel B. The respective weights of the vessels are WA and WB then
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The answer is FA=FB;WA>WB
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Pressure (and therefore force) on the two equal base areas are identical. But force is exerted by water on the sides of the vessels also, which has a nonzero vertical component when the sides of the vessel are not perfectly normal to the base. This net vertical component of force by water on sides of the vessel is greater for the first vessel than the second. Hence the vessels weigh different even when the force on the base is the same in the two cases.
Explanation:
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