Lesson 2: Speed & Velocity

• Average Speed - Total distance travelled by an object over a period of time (m/s)

  Vav = Average Speed -> Scalar Quantity
• Average Speed:

  
  

  $Vav =$$△d/△t$

  change in distance (m)

  -----------------------

  change in time (s)
• Average Velocity - The total displacement of an object in a period of time

  ->Vav = Average Velocity -> Vector Quantity
• Difference in speed & velocity: Velocity is displacement so it includes direction
• Average Velocity:

  
  

  $->Vav=$$->△d/△t$

  change in displacement (m) + [Direction]

  -----------------------

  change in time (s)
• Uniform Velocity - Motion of an object travelling in a straight line (single direction) at a constant speed.
• Non Uniform Velocity - Motion of an object travelling with changing directions and/or speeds