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Physical quantities and SI units

Physical quantities and SI units

A physical quantity is a measurable property of an object or system. A complete measurement contains a number and a unit, so 121212 is incomplete but 12 N12 \, \text{N}12N states a force.

1.1 Units and quantities Lesson

  1. GCSE
  2. /Physics
  3. /1.1 Units and quantities

Step-by-step lessons on Edexcel GCSE Physics 1.1 Units and quantities, covering 1.1.1 SI units for physical quantities and 1.1.2 Unit prefixes, conversions, significant figures and standard form. Each one builds up to exam-style questions. Master the required practical work and core equations early, since both papers can draw on content and maths skills from across the whole specification.

Lessons