4 Newtons Laws ay 2

4 Newtons Laws ay 2 - Chapter 4 Dynamics Newtons Laws of...

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1 Chapter 4 Dynamics: Newton’s Laws of Motion

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2 Introduction • What makes an object at rest begin to move? • The connection between force and motion is called dynamics . A force is anything that can cause an object to change its velocity. Force is a vector quantity
3 Contact and Field Forces A contact force is any force that arises because one body contacts another body. • Examples: kicking a football, pulling on a block. A field force is applied between two bodies even though they may never actually touch. • Examples: gravity and magnetism

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4 Net Force If several forces act simultaneously on an object, the object accelerates (changes velocity) only if the net force acting on it is not zero. F R = 141 N
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10 Inertial and Noninertial Reference Frames • An inertial reference frame is one that is not accelerating. • A noninertial reference frame is one that is accelerating with respect to an inertial reference frame. Observer on the platform sees the platform at
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4 Newtons Laws ay 2 - Chapter 4 Dynamics Newtons Laws of...

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