NEWTON'S LAWS

NEWTON'S FIRST LAW

• An object at rest stays at rest unless acted upon an outside force.
• Examples:
• Bowling ball rolling down a lane
• Seatbelts
• Airbags

HOW IS MASS RELATED TO INERTIA?

• Small mass=less inertia
• Large mass=more inertia

NEWTON'S SECOND LAW

• The acceleration of an object is directly proportional to the net force on the object and inversely proportional to the objects mass.
• Examples:
• Pushing a swing with a skinny person vs heavier person
• Kicking a chair out from under a skinny person vs heavier person
• Pushing a sled with a skinny person vs heavier person

FORMULA FOR 2ND LAW

SI UNIT FOR FORCE

NEWTON'S THIRD LAW

• For every action force, there is an equal and opposite reaction force
• Examples:
• Shooting a gun and then falling backwards
• Pushing of a skateboard and moving forward
• Slamming on the breaks and jerking forward

FORMULA FOR MOMENTUM