Is my approach for pascal's law wrong?

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SUMMARY

The discussion centers on the application of Pascal's Law in hydraulic lifts, specifically addressing the relationship between piston areas and forces. It establishes that for a hydraulic system, the equations A1*x1=A2*x2 and A1*F1=A2*F2 hold true, but emphasizes that mass flow rates and forces do not equate to acceleration in all scenarios. The conversation highlights the necessity of considering small accelerations in typical hydraulic problems, suggesting that modifications to Pascal's Law may be required under certain conditions.

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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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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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