Gas inside a sealed instrument enclosure exerts a uniform pressure of 180 000 Pa180\,000\ \mathrm{Pa}180000 Pa on a flat panel. The pressure outside the enclosure is 100 000 Pa100\,000\ \mathrm{Pa}100000 Pa. The resultant force on the panel is 2400 N outwards.
What is the area of the panel?
0.0086 m20.0086\ \mathrm{m^2}0.0086 m2
0.030 m20.030\ \mathrm{m^2}0.030 m2
0.013 m20.013\ \mathrm{m^2}0.013 m2
0.024 m20.024\ \mathrm{m^2}0.024 m2
132 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.