The document discusses Newton's three laws of motion. The 1st law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. The 2nd law establishes that the acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. The 3rd law states that for every action, there is an equal and opposite reaction, or that in every interaction, there are two forces acting on the two interacting objects.

1. 1 Law of Motion
st
• An object will maintain its state of
motion unless an outside force acts
upon it.
• The only way to cause acceleration is
with an outside force
• The “law of inertia”
• The energizer bunny law

2. 2nd Law of Motion
• Force= Mass Times Acceleration (f=ma)
• Allows you to calculate force based on
mass of object and how quickly (or slowly)
it accelerates
• Mass (kg) times Acceleration (m/s/s) gets
you units of “kg m/s/s” (which defines a
Newton)

3. 3rd law of motion
• Forces come in pairs that are
equal and opposite.
• You can’t push something without
it pushing you back
• Forces NEVER act alone!