- FLUID MECHANICS
- PRESSURE IN A FLUID
- CONSEQUENCES OF PRESSURE
- VARIATION OF PRESSURE WITH HEIGHT
- PASCALS LAW
- Hydraulic Brake
- MEASUREMENT OF ATMOSPHERIC PRESSURE
- Water Barometer
- PRESSURE IN CASE OF ACCELERATING FLUID
- STREAMLINE FLOW
- EQUATION OF CONTINUITY
- ENERGY OF A LIQUID
- BERNOULLI’S THEOREM
- APPLICATION OF BERNOULLIS THEOREM
- Venturimeter

The term fluid refers to a substance that can flow and does not have a

shape of its own. For example liquid and gases

Read moreThe pressure p is defined as the magnitude of the normal force acting on a unit surface

area.

Read moreRailway tracks are laid on large sized wooden or iron sleepers. This is

because the weight (force) of the train is spread over a large area of the

sleeper. This reduces the pressure acting on the ground and hence prevents

the yielding of ground under the weight of the train.

Read moreWeight of the small element dh is balanced by the excess pressure. It means

Read moreif the pressure in a liquid is changed at a particular, point the change is transmitted

to the entire liquid without being diminished in magnitude.

Read moreHydraulic brake system is used in auto-mobiles to retard the motion

Read moreMercury Barometer.

To measure the atmospheric pressure experimentally, torricelli invented a mercury barometer

in 1643

Read moreLet us suppose water is used in the barometer instead of

mercury

Read moreLiquid Placed in elevator :

When elevator accelerates upward with acceleration a0 then pressure in

the fluid, at depth ‘h’ may be given by

Read moreThe path taken by a particle in flowing fluid is called its line of flow. In the case of

steady flow all the particles passing through a given point follow the same path

and hence we have a unique line of flow passing through a given point which is

also called streamline

Read moreThe equation of continuity expresses the law of conservation of mass in fluid

dynamics

Read moreENERGY OF A LIQUID

A liquid can posses three types of energies

Read moreIt states that the sum of pressure energy, kinetic energy and potential

energy per unit mass or per unit volume or per unit weight

Read more(i) Bunsen burner

(ii) Lift of an airfoil.

Read moreIt is a gauge put on a flow pipe to measure the flow of speed of a liquid (Fig). Let the liquid of density

? be flowing through a pipe of area of cross section A1. Let A2 be the area of cross section at the

throat and a manometer is attached as shown in the figure. Let v 1 and P1 be the velocity of the flow

and pressure at point A, v2 and P2 be the corresponding quantities at point B.

Read more