Newton's Laws of Motion

First Law of Motion
1. States that an object at rest will remain at rest, and an object moving at a constant velocity will continue moving at a constant velocity, unless acted upon by an unbalanced force
2. Inertia
  1. Tendency of an object to resist a change in motion
3. Inertia Depends on Mass
  1. Some objects have more inertia than other objects
  2. The greater the mass of an object, the greater the inertia, greater the force is required to change its motion
Second Law of Motion
1. Determining Acceleration
  1. According to Newton's second law of motion, acceleration depends on the object's mass and on the net force acting on the object
  2. Acceleration: Net Force/Mass
2. Changes in Force and Mass
  1. A way to increase acceleration is to change the mass
3. States that Acceleration depends on the object's mass and on the net force acting on the object
Third Law of Motion
1. If one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object
  1. For every action, there is an equal but opposite reaction
2. Action-Reaction Pairs
  1. With every action, there's a reaction
  2. Action & Reaction forces don't cancel out because they are acting on different objects
3. Momentum
  1. Defined as a characteristic of a moving object that is related to the mass and velocity of the object
  2. Momentum of a moving object can be determined by multiplying the object's mass and velocity
  3. Mass x Velocity
  4. The more momentum a moving object has, the harder it is to stop
4. Conservation of Momentum
  1. Law of Conservation of Momentum
    1. In the absence of outside forces, the total momentum of objects that interact, doesn't change
    2. The total momentum of any group of objects remains the same, or is conserved, unless outside forces act on the objects

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Newton's Laws of Motion

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