State the correct SI unit for each of the following quantities: force, mass, velocity, and acceleration.

Pearson Edexcel International GCSE Physics (4PH1) — 1.1 Units · State · 4 marks · View as Markdown

Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).

Model answer (4 marks)

Force – newtons (N)
Mass – kilograms (kg)
Velocity – metres per second (m/s)
Acceleration – metres per second squared (m/s²)

Examiner tips

  • Use the exact SI symbols (N, kg, m/s, m/s²).
  • Write each quantity followed by its unit in parentheses.
  • Check that units are in the correct order: force, mass, velocity, acceleration.

Common mistakes

  • Writing ‘kg/m’ or ‘kg/m²’ for mass or acceleration.
  • Using imperial units such as pounds or miles per hour instead of SI units.

Mark scheme (4 marks)

  1. Force is measured in newtons (N)
  2. Mass is measured in kilograms (kg)
  3. Velocity is measured in metres per second (m/s)
  4. Acceleration is measured in metres per second squared (m/s²)

Key terms in this question

force · mass · velocity · acceleration

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