Question

In hydraulic press radii of connecting pipes r₁ and r₂ are in ratio 1 : 2. In order to lift a heavy mass M on larger piston, the small piston must be pressed through a minimum force f equal to –

• A. Mg
• B. Mg/2
• C. Mg/4
• D. Mg/8

Answer 1

Answer: (C)

Mg/4

Answer 2

According to Pascal’s principle

$\frac { \mathrm { r } _ { 1 } ^ { 2 } } { \mathrm { r } _ { 2 } ^ { 2 } }$ = $\frac { 1 } { 4 }$

f₁ = $\frac { 1 } { 4 }$ Mg