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9.1 , fluid mechanics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics9.1 , fluid mechanics1 Mark
MCQ
The diagram below shows a hydraulic lift.A force is applied at $side\  1$ and an output force is generated at $side\  2$. Which of the following is true?
  • A
    The force at $side\  1$ is greater than the force at $side\  2$
  • ✓
    The force at $side\  1$ is less than the force at $side\  2$
  • C
    The pressure at $side\  1$  is greater than the force at $side\  2$
  • D
    The pressure at $side\  1$ is less than the pressure at $side\  2$
✓

Answer

Correct option: B.
The force at $side\  1$ is less than the force at $side\  2$
b
Pascal's law

$\frac{\mathrm{F}_{1}}{\mathrm{A}_{1}}=\frac{\mathrm{F}_{2}}{\mathrm{A}_{2}} \Rightarrow \mathrm{F}_{1} \mathrm{A}_{2}=\mathrm{F}_{2} \mathrm{A}_{1}$

as $\mathrm{A}_{1}<\mathrm{A}_{2}$

So $\mathrm{F}_{1}<\mathrm{F}_{2}$

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