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← 4.2 Linear motion with constant acceleration

Using v² = u² + 2as

General Science · Grade 10 · about 40 minutes

When time is unknown, the third equation links the two speeds to distance; braking distance goes as the square of speed.

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Other lessons in this sub-strand

  1. Describing motion, and the four equations
  2. Free fall and the acceleration due to gravity
  3. Distance and displacement on real journeys
  4. Speed, units and average speed
  5. Velocity and relative speed
  6. Acceleration, second by second
  7. Using v = u + at
  8. Using s = ut + ½at²
  9. Using v² = u² + 2as
  10. Using s = ((u + v)/2) × t
  11. Distance–time graphs
  12. Velocity–time graphs: gradient and area
  13. Measuring acceleration on a ramp
  14. Constant acceleration around us
  15. Upward throws and the symmetric fall
  16. Stopping distances, falls and staying alive