First slide

Fluid statics

Question

A vessel contains liquid of density $σ$ filled to a height H. The vessel is placed at rest. Average pressure exerted by the liquid on the wall is:

Moderate

A

$\frac{Hσg}{2}$
B

$Hσg$
C

zero
D

$\frac{Hσg}{4}$

Solution

Average pressure $= \frac{P_{\min} + P_{\max}}{2} = \frac{0 + Hσg}{2} = \frac{Hσg}{2}$

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