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  • Created by: Rianne B
  • Created on: 24-04-13 16:18

Displacement and velocity

Displacement and velocity are both vector quantities.  This means that they have direction as well as size.  Displacement is distance in a given direction so it can be positive or negative.  Positive is forward travel and negative displacement is backward travel.

Velocity is speed in a given direction and it can be positive, or negative if an object is moving backwards.

Displacement-time graphs

  • 0A - constant speed forwards
  • AB - stationary
  • BC - constant speed back to start
  • CD - constant speed backwards
  • DE - stationary
  • EF - constant speed back towards start

Calculating speed from a graph

A - The speed is


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