Physics 9702 · AS & A Level · Density and pressure

Density and pressure — practice question

A thin horizontal plate with an area of $0.036\,\text{m}^2$ lies below the surface of a liquid that has a density of $930\,\text{kg m}^{-3}$. The force acting on one side of the plate as a result of the liquid pressure is $290\,\text{N}$. What is the depth of the plate below the liquid surface?

  • A$0.88\,\text{m}$
  • B$1.1\,\text{m}$
  • C$1.8\,\text{m}$
  • D$8.7\,\text{m}$

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