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Maths Gcse Edexcel Foundation

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  1. Scatter-Graphs-And-Correlation Edexcel Foundation
    2 主题
  2. Statistical-Diagrams Edexcel Foundation
    8 主题
  3. Statistics-Toolkit Edexcel Foundation
    7 主题
  4. Tree-Diagrams-And-Combined-Probability Edexcel Foundation
    2 主题
  5. Simple-Probability-Diagrams Edexcel Foundation
    4 主题
  6. Probability-Toolkit Edexcel Foundation
    3 主题
  7. Transformations Edexcel Foundation
    4 主题
  8. Vectors Edexcel Foundation
    3 主题
  9. Volume-And-Surface-Area Edexcel Foundation
    3 主题
  10. Circles-Arcs-And-Sectors Edexcel Foundation
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  11. Area-And-Perimeter Edexcel Foundation
    4 主题
  12. Pythagoras-And-Trigonometry Edexcel Foundation
    5 主题
  13. Congruence-Similarity-And-Geometrical-Proof Edexcel Foundation
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  14. Bearings-Scale-Drawing-Constructions-And-Loci Edexcel Foundation
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  15. 2D-And-3D-Shapes Edexcel Foundation
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  16. Angles-In-Polygons-And-Parallel-Lines Edexcel Foundation
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  17. Geometry-Toolkit Edexcel Foundation
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  18. Exchange-Rates-And-Best-Buys Edexcel Foundation
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  19. Standard-And-Compound-Units Edexcel Foundation
    5 主题
  20. Direct-And-Inverse-Proportion Edexcel Foundation
    1 主题
  21. Ratio-Problem-Solving Edexcel Foundation
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  22. Ratio-Toolkit Edexcel Foundation
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  23. Sequences Edexcel Foundation
    4 主题
  24. Solving-Inequalities Edexcel Foundation
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  25. Real-Life-Graphs Edexcel Foundation
    4 主题
  26. Graphs-Of-Functions Edexcel Foundation
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  27. Linear-Graphs Edexcel Foundation
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  28. Coordinate-Geometry Edexcel Foundation
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  29. Functions Edexcel Foundation
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  30. Forming-And-Solving-Equations Edexcel Foundation
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  31. Simultaneous-Equations Edexcel Foundation
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  32. Solving-Quadratic-Equations Edexcel Foundation
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  33. Linear-Equations Edexcel Foundation
    3 主题
  34. Algebraic-Reasoning Edexcel Foundation
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  35. Rearranging-Formulas Edexcel Foundation
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  36. Factorising Edexcel Foundation
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  37. Expanding-Brackets Edexcel Foundation
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  38. Algebraic-Roots-And-Indices Edexcel Foundation
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  39. Algebra-Toolkit Edexcel Foundation
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  40. Using-A-Calculator Edexcel Foundation
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  41. Exact-Values Edexcel Foundation
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  42. Rounding-Estimation-And-Error-Intervals Edexcel Foundation
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  43. Fractions-Decimals-And-Percentages Edexcel Foundation
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  44. Simple-And-Compound-Interest-Growth-And-Decay Edexcel Foundation
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  45. Percentages Edexcel Foundation
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  46. Fractions Edexcel Foundation
    6 主题
  47. Powers-Roots-And-Standard-Form Edexcel Foundation
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  48. Types-Of-Number-Prime-Factors-Hcf-And-Lcm Edexcel Foundation
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  49. Number-Toolkit Edexcel Foundation
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Exam code:1MA1

Speed, density & pressure

What are speed, density and pressure?

  • Speed, density and pressure are frequently used compound measures

    • Speed is equal to distance divided by time

    • Density is equal to mass divided by volume

    • Pressure is equal to force divided by area

Formula Triangles for Speed, Density and Pressure

What should I know about speed, distance and time?

  • Speed is commonly measured in metres per second (m/s) or kilometres per hour (km/h)

    • The units indicate speed is distance per time
      Speed equals Distance over Time

  • ‘Speed‘ (in this formula) means ‘average speed‘

  • In harder problems there are often two journeys or two parts to one longer journey

What should I know about density, mass and volume?

  • Density is usually measured in grams per centimetre cubed (g/cm3) or kilograms per metre cubed (kg/m3)

    • The units indicate that density is mass per volume
      Density equals Mass over Volume

  • You may need to use a volume formula to find the volume of an object first

What should I know about pressure, force and area?

  • Pressure is usually measured in Newtons per square metre (N/m2)

    • The units of pressure are often called Pascals (Pa) rather than N/m2

    • The units indicate that pressure is force per area
      Pressure equals Force over Area

  • Remember that weight is a force

    • It is different to mass

Examiner Tips and Tricks

  • Look out for a mixture of units

    • Time can be given as minutes but common phrases like ‘half an hour’ (30 minutes) could also be used in the same question

    • Any mixed units should be those in common use and easy to convert, e.g., g to kg or m to km etc

Worked Example

A box exerts a force of 140 newtons on a table.
The pressure on the table is 35 newtons/m2.

p equals F over A <img alt=”p space equals space pressure
F space equals space force
A space equals space area” data-mathml='<math ><semantics><mrow><mi>p</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>pressure</mi><mspace linebreak=”newline”></mspace><mi>F</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>force</mi><mspace linebreak=”newline”></mspace><mi>A</mi><mo>&#160;</mo><mo>=</mo><mo>&#160;</mo><mi>area</mi></mrow><annotation encoding=”application/vnd.wiris.mtweb-params+json”>{“language”:”en”,”fontFamily”:”Times New Roman”,”fontSize”:”18″,”autoformat”:true}</annotation></semantics></math>’ height=”74″ role=”math” src=”data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Awrs%3D%22http%3A%2F%2Fwww.wiris.com%2Fxml%2Fmathml-extension%22%20height%3D%2274%22%20width%3D%2296%22%20wrs%3Abaseline%3D%2236%22%3E%3C!–MathML%3A%20%3Cmath%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmi%3Ep%3C%2Fmi%3E%3Cmo%3E%26%23xA0%3B%3C%2Fmo%3E%3Cmo%3E%3D%3C%2Fmo%3E%3Cmo%3E%26%23xA0%3B%3C%2Fmo

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