Distance, displacement, speed and velocity

• What is the definition of displacement?

  Change in position of an object
• How is displacement different from distance?

  Displacement is a vector; distance is scalar
• If an object has a displacement of $10m$ and a distance traveled of $12m$, what does this imply?


  Path taken is longer than direct route
• What is the definition of speed?

  Rate at which an object covers distance
• How do speed and velocity differ?

  Speed is scalar; velocity is vector
• Can an object travel at constant speed while changing velocity? Why?

  Yes, if it changes direction
• What is the formula for calculating distance traveled?

  Distance = Speed x Time
• If a person walks at a speed of $1.5 m/s$, how far will they travel in $10s$?


  $15 m$
• What is the average speed of a person running?

  3 m/s
• What is the average speed of a person cycling?

  6 m/s
• What is the average speed of a car?

  55 m/s
• What is the average speed of a train?

  55 m/s
• What is the average speed of a plane?

  250 m/s
• What are the average speeds of different modes of transportation?

  • Walking: 1.5 m/s
  • Running: 3 m/s
  • Cycling: 6 m/s
  • Car: 55 m/s
  • Train: 55 m/s
  • Plane: 250 m/s