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8.3 Quantities and Units
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Quantities, units and SI

Quantities, units and SI

Flow diagram linking displacement, velocity, acceleration and force to their SI units: metre, metre per second, metre per second squared and newton In mechanics, a number without a unit is incomplete because 20 m20\,\mathrm{m}20m, 20 s20\,\mathrm{s}20s and 20 m s−120\,\mathrm{m}\,\mathrm{s}^{-1}20ms−1 describe different things. A quantity is something measurable, and a unit tells you the scale used.

8.3 Quantities and Units Lesson

  1. A Level
  2. /Maths
  3. /8.3 Quantities and Units

Step-by-step lessons on Edexcel A Level Maths 8.3 Quantities and Units. Each one builds up to exam-style questions. Build fluency with the core pure algebra and calculus toolkit early, since almost every mechanics and statistics topic on the course depends on it.

Lessons