P.2

• Vector - shows direction and distance
• Scalar - shows no direction but it shows distance
• Acceleration - change in velocity per second
• Non contact forces are -

  • Electrostatics (repels and attracts)
  • Gravity (attracts)
  • Magnetism (repels and attracts)
• Contact forces are -

  • Friction
  • Drag (air resistance or water resistance)
  • Normal contact force
  • Upthrust
  • Tension
• Free body diagram - diagram that shows forces acting on a single object
• Newton's 1st law of motion 


  A resultant force is required to change the motion of an object

  (If there is no resultant force the objects motion wont change)
• Newton's 2nd law of motion (1st part )


  If a non - zero resultant force acts on an object then it will cause the object to accelerate
• Depending on the initial motion of the particle,5 different things can happen

  1. Stationary -> moving
  2. If its already moving a direction it will speed up in the same direction
  3. If it's Travelling in a direction and force is acted in opposite way it will slow down
  4. Moving slowly -> stop moving
  5. Change in direction, since direction also changes velocity
• Newton's 2nd law (Part 2)


  The size of the resultant force is directly Proportional to the acceleration it causes