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This lesson covers pressure and other compound measures that feature in the Edexcel GCSE Mathematics (1MA1) specification. Compound measures involve a combination of two or more basic measures. As well as speed and density (covered in previous lessons), you need to be able to work with pressure, population density, flow rates and fuel consumption.
| Term | Meaning | Units |
|---|---|---|
| Pressure | Force per unit area | Pascals (Pa) or N/m^2 |
| Force | A push or pull on an object | Newtons (N) |
| Area | The surface area over which the force acts | m^2 or cm^2 |
| Population density | Number of people per unit area | people per km^2 |
| Flow rate | Volume of fluid passing a point per unit time | litres per minute, m^3 per hour |
| Fuel consumption | Distance travelled per unit of fuel | miles per gallon (mpg) or km per litre |
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