A U-tube has dissimilar arms, one having twice the diameter of the other.It contains an incompressible fluid and is fitted with a sliding piston in each arm, with each piston in contact with the fluid.When an applied force does work W in pushing the piston in the narrow arm down, the fluid does work __________ on the piston in the wide arm.
A)W
B)2W
C)W/2
D)4W
E)W/4

Question

Quizplus · Accepted Answer

The work done by the fluid on the piston in the wide arm is equal to the work W applied on the piston in the narrow arm. This is because the work done on a system is equal to the work done by the system in a closed system, assuming no losses.

A U-Tube Has Dissimilar Arms, One Having Twice the Diameter