motion

• scalar - a quantity that only has size (or magnitude) and no direction (e.g. distance)
• vector - a quantity that has size and direction (e.g. velocity, displacement)
• examples:


  Scalar quantity -

  speed

  distance

  mass

  Vector quantity -

  velocity

  displacement

  acceleration
• • distance - how far an object travels over a certain period of time
  • displacement - a vector quantity that measures the change in position of an object and its direction over a certain period of time
  • speed - speed is defined as the are of change in distance with respect to time
  • velocity - velocity is defined as the rate of change in displacement with respect to time