Lecture3_Fall2008

# Lecture3_Fall2008 - Lecture 3 Newtons Second Law of Motion...

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1 Lecture 3: Newton’s Second Law of Motion Plan 1. Newton’s First Law 2. Net force 3. Newton’s Second Law 4. Acceleration, Force, and Mass 5. Examples Homework Conceptual Physical Science – Explorations: Chapters 1 and 2 Chapter 3: Key Terms Review Questions - 3, 5, 6, 9 Exercises: 3, 5, 7, 14 Problems: 2, 4, 6 Newton’s First Law Every object continues in a state of rest, or in a state of motion in a straight line at a constant speed, unless it is compelled to change that state by FORCES exerted upon it. V What happens if the net force exerted upon an object is not zero? The object will change its state: its velocity (magnitude or direction, or both) will be changed. V=0 F V 0

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2 Newton’s Second Law The ACCELERATION produced by a NET FORCE on an object is directly proportional to the NET FORCE , is in the same direction as the NET FORCE , and inversely proportional to the MASS of object . Acceleration = Change of velocity time interval ACCELERATION Notation: a Definition: Example
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Lecture3_Fall2008 - Lecture 3 Newtons Second Law of Motion...

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