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  4. Figure shows the vertical cross-section of a vessel filled with a liquid of density ρ. The normal thrust per unit area on the walls of the vessel at point P, as shown will be

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Q. Figure shows the vertical cross-section of a vessel filled with a liquid of density $\rho$. The normal thrust per unit area on the walls of the vessel at point $P$, as shown will bePhysics Question Image

Mechanical Properties of Fluids

Solution:

Depth of point $P$ below the free surface of water in the vessel $=(1+h)$.
Since, the liquid exerts equal pressure in all direction at one level, hence the pressure at $P=(H-h) \rho g$.