1. Newton’s Laws of Motion
Section 1-3
Newton’s Laws of Motion

2. Newton’s Laws of Motion
Sir Issac Newton published a book called Principia
He explained 3 laws of motion (even though he did not discover all of them)

3. Newton’s First Law of Motion
States: An object at rest remains at rest and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force
Newton’s 1st Law is sometimes called the law of Inertia
Inertia- the tendency of objects to resist any changes of motion
Object at rest- object that is not moving
Object in motion- object that is moving
Unbalanced force that acts on every moving object is friction

4. Newton’s Second Law of Motion
States: The Acceleration of an object depends on the mass of the object and the amount of force applied
Force= Mass X Acceleration
Acceleration= Force Divided by Mass

5. Newton’s Third Law of Motion
States: Whenever an object exerts a force on a second object exerts an equal and opposite force on the first
All forces act in pairs

6. Momentum Is a Property of Moving Objects
Momentum- property of a moving object that depends on the objects mass and velocity
Law of Conservation of Momentum- any time 2 objects interact, they may exchange momentum, but the total amount of momentum stays the same
This explains Newton’s 3rd Law of Motion