A piston-cylinder contains air at pressure of 500kPa. The piston
movement is resisted by a spring and atmospheric pressure of 100kPa. The
air moves the piston and the volume changes from 0.15m3 to 0.60m3.
Determine the work when (A)the force of the spring is directly
proportional to the displacement (B)the force of the spring is
proportional to the square root of the displacement. [ANS: (A)562.5kJ