P12 - Newton's Laws of Motion

• Newtons First Law of Motion:

  An object will remain in the same motion unless a resultant force is applied on it.
• If an object's resultant force is zero, then it means:

  1. The object is stationary
  2. The object is moving at a constant speed
• Change in velocity can lead to an object:

  speeding up, slowing down, starting to move, stopping or changing direction
• Inertia is the tendency for an object to remain in a steady state
• Inertial Mass is a measure of how difficult it is for an object to change velocity
• Newton's Second Law states:

  1. Force is directly proportional to acceleration
  2. Force is inversely proportional to the mass
• Force = mass x acceleration
• Newton's Third Law:

  When two objects interact, they exert equal and opposite forces on each other