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Homework Help: Pressure in a piston-cylinder

  1. Sep 18, 2010 #1
    Warm air is contained in a piston-cylinder assembly cools slowly from volume of 0.003 m^3 to 0.002 m^3. During the process a spring exerts a force that varies linearly from an initial value of 900 N to final value of 0. Patm = 100 kPa and the area of the piston face is 0.018 m^2.


    V1 = 0.003 m^3
    V2 = 0.002 m^3

    F1 = 900 N
    F2 = 0

    Patm = 100 kPa


    I'm not exactly sure where to start here. Can someone help me figure out what formula to use?
    Last edited: Sep 18, 2010
  2. jcsd
  3. Sep 19, 2010 #2


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    Homework Helper

    PV = nRT applies to the air in the piston.
    F = kx applies to the spring.
    What is the question?
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