Is my approach for pascal's law wrong?

In summary, the conversation discusses the application of Pascal's law in a hydraulic lift. It explains how the law applies to the displacement, volume, and acceleration of the pistons in the lift. It also clarifies that the force on each piston is not solely determined by the mass and acceleration, but rather by other factors as well.
  • #1
Dileep Ramisetty
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In hydraulic lift utilising pascal law, larger piston area is A1 and the smaller piston area is A2
mass in = mass out and volume in = volume out (in-compressible),so
A1*x1=A2*x2 (let x1 and x2 are displacements of respective pistons)
A1*V1 =A2*V2 (on differentiation gives continuity eq)
A1 * acceleration1=A2*acceleration2 (on differentiating again)
as mass flow rates m are equal,
m*A1*acceleration1=m*A2*acceleration2
A1*F1=A2*F2 (is giving me inverse of the pascal law)
please clarify...Thank you
 

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  • #2
m*a1 is not the force on plate 1, no matter what "m" is.
m*a2 is not the force on plate 2, no matter what "m" is.

In particular, you can have a force without any acceleration.

Typically those problems assume that the acceleration is small and can be neglected. Otherwise Pascal's law needs modifications.
 
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1. What is Pascal's Law?

Pascal's Law, also known as the principle of transmission of fluid-pressure, states that pressure applied to a confined fluid at rest is transmitted equally in all directions.

2. How is Pascal's Law applied in science?

Pascal's Law is applied in various fields of science, including fluid mechanics, hydraulics, and engineering. It is used to understand the behavior of fluids and to design systems that utilize fluid pressure.

3. What are some common misconceptions about Pascal's Law?

One common misconception is that Pascal's Law only applies to liquids, when in fact it applies to all fluids, including gases. Another misconception is that Pascal's Law only applies to static fluids, when it also applies to fluids in motion.

4. How can I check if my approach for understanding Pascal's Law is correct?

One way to check your understanding is to apply Pascal's Law to different scenarios and see if the results align with the principle. You can also consult reliable sources and seek guidance from a teacher or expert in the field.

5. What are some real-world applications of Pascal's Law?

Pascal's Law is used in a wide range of applications, including hydraulic systems in cars and airplanes, hydraulic elevators, and hydraulic presses used in manufacturing. It is also applied in medical devices, such as blood pressure cuffs and syringes.

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