Q.
A cylindrical jar has radius r. To what height h should it be filled with a liquid so that the average force exerted by the liquid on the sides of the jar equals to the force exerted on the bottom ?
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a
h=r2
b
h=r
c
h=2r
d
h=4r
answer is B.
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Detailed Solution
Force exerted at the walls=Thrust force on botttom ρgh22πrh=ρghπr2 r=h
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