A container and its contents have a total weight of 900 N. The container rests on a base of area 0.030 m2. Some contents are removed and the pressure on the base becomes 18000 Pa. What weight of contents has been removed?
360 N360\ \mathrm{N}360 N
540 N540\ \mathrm{N}540 N
600 N600\ \mathrm{N}600 N
1440 N1440\ \mathrm{N}1440 N
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.