1. Chapter 6
Newton’s First Law

2. Newton’s First Law Newton’s First Law:
An object at rest will stay at rest and an object in motion will continue in motion at constant velocity UNLESS there is a net force.

3. According to the vectors, what direction is the net force?
Forces and Motion
According to the vectors, what direction is the net force?

4. Forces and Motion Forces can: - increase the speed of an object
- decrease the speed of an object
- change the direction an object is moving

5. First Law Concepts Net Force of 0: - motion of object does not change
- moving object: continues same motion
- object at rest: stays at rest
Net Force not 0:
- forces are not balanced
- unbalanced forces cause a change in motion

6. Which ball has more inertia? More mass = more inertia
Law of Inertia
Inertia: the property of an object that resists changes in motion
Which ball has more inertia?
More mass = more inertia
Newton’s First Law is also called the Law of Inertia