Answer to Question #306377 in Physics for lea

Question

The piston of a hydraulic automobile lift is 30 cm in diameter. What pressure, in

pascals, is required to lift a car of mass 1500 kg. Also express this pressure in

atmosphere.

Answer 1

The pressure

$$P=\frac{F}{A}=\frac{mg}{\pi d^2/4}$$ $$P=\frac{1500*9.8}{3.14*0.3^2/4}=2.08*10^5\:\rm Pa=2.05\: atm$$