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Laws of Motion

  1. Every object will stay in a state of rest or motion unless an outside force acts on it
    • The motion will have a constant speed
    • Restatement of Galileo's discovery of the conservation of momentum
    • Sometimes called the law of inertia
  2. Change of motion of a body is proportional to and in the direction of the force acting on it
    • F=maF = ma
    • If you want to accelerate anything, you have to apply a force
  3. For every action there is an equal and opposite reaction
    • Mutual actions of two bodies upon each other are always equal and act in opposite directions

Physics