In a car service station, the air exerts a force on a small piston of radius r = 5 cm. The change in pressure is transmitted by an incompressible liquid, of unknown relative density, to a second piston of radius R = 15 cm. What force must compressed air exert on the small piston in order to lift a car that weighs 15,000 N? Consider the weight of both pistons negligible. A) 1 666.67 N B) 135 000 N C) 5 000 N D) 45 000 N

In a car service station, the air exerts a force on a small piston of radius r = 5 cm. The change in pressure is transmitted by an incompressible liquid, of unknown relative density, to a second piston of radius R = 15 cm. What force must compressed air exert on the small piston in order to lift a car that weighs 15,000 N? Consider the weight of both pistons negligible. A) 1 666.67 N B) 135 000 N C) 5 000 N D) 45 000 N