Physics 9702 · AS & A Level · Density and pressure

Density and pressure — practice question

A gas in an engine carries out work on a piston whose cross-sectional area is $80\,\text{cm}^2$. The piston is under a constant pressure of $4.6 \times 10^5\,\text{Pa}$. What amount of work is done by the gas on the piston as it travels a distance of $25\,\text{cm}$?

  • A$9.2 \times 10^2\,\text{J}$
  • B$9.2 \times 10^4\,\text{J}$
  • C$9.2 \times 10^6\,\text{J}$
  • D$9.2 \times 10^8\,\text{J}$

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