Scalar and vector quantities

• scalars

  things that we measure that have a magnitude (size) only are scalars
• vectors

  things that we measure that have both magnitude and direction
• examples of scalar quantities

  • time
  • mass
  • temperature
  • speed
  • direction
• example of vector quantities

  • forces
  • displacement
  • velocity
  • acceleration
  • momentum
• vectors can be shown by arrows. the length of the arrow shows the size, or the magnitude of the force. The direction of the arrow shows the direction of the force. The vector arrows can be added together to show the resultant of 2 or more vectors