Hydraulic lifts and hydraulic brakes are based on
Archimedes' principle
Bernoulli's principle
Stoke's law
Pascal's law
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Hydraulic machines & lifts are based on
Pressure applied to enclosed fluid is
increased and applied to every part of the fluid.
diminished and transmitted to wall of container.
increased in proportion to the mass of the fluid and then transmitted
transmitted unchanged to every portion of the fluid and wall of containing vessel.
Pressure applied to enclosed fluid is transmitted equally in all direction according to Pascal law.
In a hydraulic lift, compressed air exerts a force on a small piston having a radius of . This pressure is transmitted to a second piston of radius . If the mass of the load to be lifted is , find the value of ? The pressure necessary to accomplish this task is
Since pressure is transmitted undiminished throughout the fluid (Pascal's law)
The air pressure that will produce this force is
A pressure-pump has a horizontal tube of cross sectional area for the outflow of water at a speed of . The force exerted on the vertical wall just in front of the tube which stops water horizontally flowing out of the tube, is:
[given: density of water ]
Momentam transferred by water per sec
Two cylindrical vessels of equal cross-sectional area 16 contain water upto heights and respectively. The vessels are interconnected so that the water levels in them become equal. The work done by the force of gravity during the process, is
[Take density of water and ]
Let ' ' be the rise (or fall) in water.
Final volume of both vessel will be same
So,
Work done Potential Energy of extra water that enters in cylindrical vessel
joule
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