GCSE Combined Science (AQA)

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Speed

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Forces Forces and motion

Speed

2:30 Distance, Displacement and Speed
Spec 4.5.6.1.2
Previous Kinetic & Elastic Conversions Next Velocity-Time Graphs
  • Speed measures the distance an object travels over time.
  • Speed is a scalar quantity.
  • Different objects, like a rabbit and a tortoise, have different speeds.
  • Speed is measured in meters per second (m/s).
  • Typical speeds for various movements:
  • Walking: 1.5 m/s
  • Running: 3 m/s
  • Cycling: 6 m/s
  • Factors affecting speed include muscle power and effort required.
  • Typical speeds for transport with engines:
  • Car: 30 m/s
  • Train: 60 m/s
  • Plane: 200 m/s
  • Recognize sensible values for transport speeds rather than exact values.
  • Typical maximum speeds are used on motorways or at high altitudes.
  • Speeds of sound and light:
  • Sound: 330 m/s
  • Light in a vacuum: 3 x 10^8 m/s
  • Speed values may vary depending on the medium they travel through.
  • Recall typical speed values for exams.

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