A2L Item 088

Goal: Problem solving

Source: UMPERG

A quantity of gas is confined to a cylinder. The cylinder is vertical
and capped by a moveable piston of mass 2 kg and area 0.1 m2.
The gas is heated until the piston rises 20 cm. The amount of work done
by the gas is most nearly

  1. 4 J
  2. 1 J
  3. -20 J
  4. 0.4 J
  5. None of the above
  6. Cannot be determined



(1) This problem helps interrelate concepts from mechanics and
thermodynamics. The work can be determined from the work done against
the gravitational force.