Why is the cross-sectional area of the pistons always different in a hydraulic press?

| September 19, 2021 | education

The hydraulic press is used in practice to increase strength.
According to the definition, the pressure P is the ratio of the force F to the area on which this force acts S.
P = F / S.
For a liquid, Pascal’s law is valid: pressure in a liquid or gas is transmitted in all directions in the same way.
Oil pressure on a piston with a smaller cross-sectional area and oil pressure on a piston with a larger cross-sectional area are equal.
Rm = RB.
Oil pressure on the small piston: Pm = Fm / Sm.
Oil pressure on the large piston: Pb = Fb / Sb.
Fm / Sm = Fb / Sb.
Since Sm <Sb, then Fm> Fb.
The force of the small piston Fm is greater than the force of the large piston Fb, there is a gain in force.
Answer: The cross-sectional areas of the pistons are always different to increase the force.



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