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.
- 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…