Pascal's Law: Definition, Formulas, Application, Working Principles, Example Problems
Pascal's Law: Definition, Formulas, Application, Working Principles, Example Problems – In this discussion we will explain about Pascal's law. Which includes the meaning of Pascal's law, Pascal's legal sound, Pascal's legal formula, application or application Pascal's law, working principles or ways of working and examples of Pascal's law questions which are discussed in full and light. For more details, please see the review below carefully.
Pascal's Law: Definition, Formulas, Application, Working Principles, Example Problems
Let's discuss the understanding of Pascal's law first carefully.
Understanding Pascal's Law
Pascal's law reads "If pressure is exerted on one part of a liquid in a closed room, it will be continued by the liquid in all directions equally."
The phenomenon of liquid pressure was originally investigated by a physicist named Blaise Pascal (1623-1662) until a law called Pascal's law appeared.
On everyday life application of Pascal's law often used in such fields as automotive, hydraulic jacks, hydraulic disc brakes, hydraulic handbrakes, hydraulic presses, sphygmomanometers or sphygmomanometers. Pascal's law is the application of a concept of pressure in a liquid. If you've ever seen a mechanic use a hydraulic jack to lift a car, that's an application of Pascal's law.
Pascal's Law Formulas
The statement of Pascal's law can be explained by examining the behavior of liquids in a related vessel. If the sucker I is given a compressive force F1 then the pressure obtained will be forwarded to the suction II with the same magnitude, so that it applies:
p.s1= p2
With description:
F1 = force in section I (N)
F2 = force in section I (N)
A1 = cross-sectional area 1 (m2)
A2 = cross-sectional area 2 (m2)
On the basis of the formula above the force F2 affected by each surface of the vessel. Thus if the surface of the vessel is larger, the force obtained will also be greater. That's why a mechanic can lift a car.
Pascal's Law Working Principle
Tools that work by applying working principles with Pascal's law, include:
1. Hydraulic Disc Brakes
Utilization of Pascal's law is applied to hydraulic (disc) brakes. Brakes (disc) wear oil fluid. When your foot steps on the brake pedal, the piston (connecting pipe) will put pressure on the oil in it. The pressure is then passed on to the two output pistons which function as brake regulators.
This brake will clamp the metal disc which causes friction to arise on the disc which is against the direction of the disc's motion so that the wheel spin stops. When the first piston (A1) is pressed, then the second piston surface (A2) will rise.
Under these conditions, according to Pascal's law, the relationship between the volume of oil pushed up and the volume of oil rising can be produced. If the volume of pressed oil (V1) is the same as A1 h1 and oil volume increases (V2) is the same as A2 h2, so:
V1= V2
A1 h1 = A2 h2h2
With description:
h1 = fluid height in the first piston
h2 = fluid height in the second piston
A1 = cross-sectional area of first piston
A2 = cross-sectional area of second piston
2. Hydraulic jack
A hydraulic jack is a tool used to lift a car when changing tires or other purposes. This tool utilizes two cylinders, namely a large cylinder and a small cylinder.
When a hydraulic jack is pressed, the oil in the small cylinder will be compressed and flow into the large cylinder. The pressure on the large cylinder will cause a force to arise so that it can lift an object or heavy load. If you push the small cylinder with a force F1, then the applied pressure is:
Based on Pascal's law, this pressure can be experienced in a large cylinder so that:
3. Hydraulic Pump
Hydraulic pumps use kinetic energy and liquid is pumped in a column and that energy is given pressure which suddenly becomes energy in another form (compressive energy). This pump functions to transfer mechanical energy into hydraulic energy. The hydraulic pump works by sucking oil from the hydraulic tank and pushing it into the hydraulic system in the form of a stream. This flow is used by turning it into pressure. Pressure is generated by blocking the flow of oil in the hydraulic system
4. Hydraulic Press Tool
Hydraulic presses rely heavily on the principle of Pascal's law, namely the pressure throughout a closed system is constant. One part of a closed system, namely the piston works as a pump, with simple mechanical forces acting on a small cross-sectional area, another part, namely the piston with a larger area, produces greater mechanical strength also.
Examples of Pascal's Law Questions
A car hydraulic lifting device has a small and large cross-sectional area ratio of 1:5. If the tool is used to lift a car that weighs 5000 newtons, then how much force is needed to lift the car?
Completion:
Is known:
A1 =1
A2 =5
F2 = 5000 N
Asked: F1 …?
Answer:
Then the force needed to lift a car weighing 5000 N is 1000 N.
Thus has been explained about Pascal's Law: Definition, Formulas, Application, Working Principles, Example Problems, hopefully can add to your insight and knowledge. Thank you for visiting and don't forget to read other articles.
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