Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

Gravitational force is more than the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid
None of these
Gravitational force is equal to the up-thrust of the liquid

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Hydraulics and Fluid Mechanics in ME
Two dimensional flows occurs when

The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
The direction and magnitude of the velocity at all points are identical
The velocity of successive fluid particles, at any point, is the same at successive periods of time
The magnitude and direction of the velocity do not change from point to point in the fluid

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