A boat floats at rest in water of density 1000 kg/m3 and displaces 0.60 m3. It moves into salt solution of density 1200 kg/m3. Its mass remains constant. Which gives the new displaced volume and the change in upthrust?
0.50 m30.50\ \mathrm{m^3}0.50 m3; upthrust increases.
0.50 m30.50\ \mathrm{m^3}0.50 m3; upthrust is unchanged.
0.72 m30.72\ \mathrm{m^3}0.72 m3; upthrust is unchanged.
0.72 m30.72\ \mathrm{m^3}0.72 m3; upthrust increases.
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.