A steel model is suspended from a force meter. The reading is 7.0 N in air and 5.9 N when the model is fully immersed in glycerol without touching the container.
The same model is fully immersed in a second liquid, displacing the same volume of liquid.
Determine how much the force-meter reading falls when the model is immersed in the glycerol.
Explain why the force-meter reading is lower when the model is immersed in the glycerol.
The second liquid is denser than the glycerol. Explain how the upthrust on the model in the second liquid compares with its upthrust in the glycerol.
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.