Hydraulics & Fluid Mechanics
The horizontal component of force on a curved surface is equal to the

force on a vertical projection of the curved surface
weight of liquid vertically above the curved surface
force on the horizontal projection of the curved surface
product of pressure intensity at its centroid and area

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Hydraulics & Fluid Mechanics
Fluid is a substance that

has the same shear stress.at a point regardless of its motion
always expands until it fills any container
cannot remain at rest under action of any shear force
cannot be subjected to shear forces

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

parabolic distribution across the section
zero at the mid plane and varies linearly with distance from mid plane
constant over the cross section
zero at plates and increases linearly to midpoint

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