A testing machine applies a force normal to a flat panel. In the first setup, the contact plate has an area of 0.040 m² and the machine applies a force of 800 N. In the second setup, the contact plate has an area of 0.025 m².
Calculate the pressure on the panel in the first setup.
Calculate the force the machine must apply in the second setup to keep the pressure on the panel unchanged.
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.