Physics 5054 · O Level · Pressure

Pressure — practice question

A piston with an area of $10\,\text{cm}^2$ is moved in slowly into a very large cylinder that contains gas at a pressure of $10\,\text{N cm}^{-2}$. As the piston travels a distance of $0.10\,\text{m}$, the gas pressure stays constant. What force does the gas exert on the piston, and what work is done by the piston on the gas?

  • Aforce $= 1.0\,\text{N}$, work done $= 0.1\,\text{J}$
  • Bforce $= 1.0\,\text{N}$, work done $= 10\,\text{J}$
  • Cforce $= 100\,\text{N}$, work done $= 10\,\text{J}$
  • Dforce $= 100\,\text{N}$, work done $= 1000\,\text{J}$

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