Air is pumped out of a food-storage box until the pressure inside is negligible.
The flat lid has an area of 0.0175 m2.
The atmospheric pressure outside the box is 96 000 Pa96\,000\ \text{Pa}96000 Pa.
Calculate the resultant force on the lid due to the pressure difference.
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.