Chapter 6 Newton’s First Law.

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Presentation transcript:

Chapter 6 Newton’s First Law

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.

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

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

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

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