A pressure sensor records the atmospheric pressure at two heights. The pressure acts on a flat surface with an area of 0.010 m2 at each height.
| Height above sea level in m | Atmospheric pressure in kPa |
|---|---|
| 100 | 100 |
| 1100 | 90 |
Calculate the force exerted by the atmosphere on the surface at each height, and explain why the force changes as the height 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.