1. Newton’s Three Laws of Motion

2. First Law – The Law of Inertia
An object in motion will remain in motion unless a force acts on it.
If an object is at rest, it will remain at rest until a force acts on it.

3. 2nd Law – The Law of Acceleration
When a force acts on an object, the object will accelerate in the direction of the force.
Acceleration depends on mass.
Acceleration increases as mass decreases.
Acceleration depends on force.
Acceleration will increase as the force increases.
Acceleration of an object is always in the same direction as the force applied.
Force = mass x acceleration
F = m x a

4. Add to your equation chart
The equation for force when mass and acceleration are known.
F = m x a
F is force; m is mass and a is acceleration
Force is measured in newtons (N).

5. 3rd Law – The Law of Action and Reaction
When one object exerts a force on a second object, the second object exerts a force on the first object that is equal in size and opposite in direction.
For every action there is an equal and opposite reaction.

6. Mass (metric= kilograms; US= pounds)
the amount of matter in an object; measured in grams
(compare a golf ball with a ping pong ball)
Weight (metric= Newtons; Us= pounds)
the amount of gravitational force on an object
measured in newtons or pounds
(compare a bowling ball on Earth and on the moon)
Gravity
the force pulling objects downward toward Earth

7. Friction Acceleration Inertia
A force that acts between two surfaces in contact with each other
Acceleration
The rate of change in an object’s velocity
Inertia
the tendency of an object to resist changes in motion