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9-1.Fluid Mechanics
normal
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 $2$
B
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 $2$
Solution
Pascal's law
$\frac{F_{1}}{A_{1}}=\frac{F_{2}}{A_{2}} \Rightarrow F_{1} A_{2}=F_{2} A_{1}$
as $\mathrm{A}_{1}<\mathrm{A}_{2}$
$\mathrm{So} \mathrm{F}_{1}<\mathrm{F}_{2}$
Standard 11
Physics
