Contact and non- contact forces

• vectors have magnitude and direction

  they are often represented by an arrow. the length Of the arrow shows the magnitude

  • Force
  • velocity
  • acceleration
  • momentum
• Scalar quantities only have magnitude

  • Speed
  • distance
  • Mass
  • temperature
  • time
• Contact forces:

  when two objects have to be touching for a force to act

  • friction
  • air resistance
  • normal contact force
• Non contact:

  when two objects do not need to be touching for a tone to react

  • magnetic force
  • gravity