: Hydraulic Press & Pascal's Law

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SUMMARY

The discussion centers on the relationship between Pascal's Law and Newton's Laws of motion in the context of hydraulic presses. Participants explore the mechanics of a hydraulic press with two pistons of different areas, specifically addressing the forces and accelerations involved. It is established that while the smaller piston exerts a force, the larger piston experiences a different acceleration due to its greater area and mass. The confusion arises from the assumption that forces should be equal despite differing areas and accelerations.

PREREQUISITES
  • Understanding of Pascal's Law and its applications in hydraulics
  • Familiarity with Newton's Laws of motion
  • Basic knowledge of fluid mechanics
  • Concept of force, area, and acceleration in physics
NEXT STEPS
  • Study the derivation of Pascal's Law and its implications in hydraulic systems
  • Examine Newton's Laws of motion in relation to fluid dynamics
  • Research the mechanics of hydraulic presses and their applications
  • Investigate the relationship between force, area, and acceleration in various hydraulic configurations
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Physics students, engineers, and anyone interested in understanding the principles of hydraulics and fluid mechanics.

luis20
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Is there any way to deduce pascal law from Newton's laws?

Another question: in a hydraulic press, with the smaller piston with A=1, and the other with A=2, the force in both shouldn't be the same?

When the smaller piston goes down a distance d, the other piston goes up a distance d/2.

So the aceleration in the smaller piston has to be twice the aceleration of the largest piston, at each interval. Since the mass in the largest piston is twice the mass of the smaller piston, both forces should be equal.

I'm confused
 
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luis20 said:
Since the mass in the largest piston is twice the mass of the smaller piston..
How do you know this?
 
nasu said:
How do you know this?

Maybe I shouldn't think about the piston, but about the fluid below the piston, double area, double mass suporting the piston (or double molecules suporting the piston, giving aceleration to the piston).
 

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