## Hydraulics & Fluid Mechanics The line of action of the buoyant force acts through the

centriod of the displaced volume of fluid
center of gravity of any submerged body
centroid of the volume of fluid vertically above the body
center of the volume of floating body

## Hydraulics & Fluid Mechanics Fluid is a substance that

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

40 M/SEC
22.5 M/SEC
50 M/SEC
33 M/SEC

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

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

## Hydraulics & Fluid Mechanics Steady flow occurs when

the direction and magnitude of the velocity at all points are identical
the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
the magnitude and direction of the velocity do not change from point to point in the fluid
the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time