# Lecture-09 - Circular CircularMotion Lecture#09 Ch.5.1 5.7...

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ircular Motion Circular Motion Lecture #09 – Ch. 5.1 – 5.7 Physics 125–Fall 2010 Dr. Mike Melnichuk mmeln@umich.edu Office: 2409 Randall Lab phys125lecture@umich.edu ffice Hours: 2:00 :00 / Mon & Tue Rm 1416 Randall Lab Office Hours: 2:00 – 4:00 / Mon. & Tue. in Rm. 1416 Randall Lab.

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Uniform Circular Motion Uniform Circular Motion: The motion of an object in a circle with constant speed. The (vector) velocity has its magnitude constant but NOT its direction ! The direction of v is different at any point on the circular trajectory. G
Tangential Speed and Period 2 r Circumference of circular path v π == = G vv . T Period of time of one rotation is the radius of the circle. r r r

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Centripetal Acceleration Just the change in the direction of v without any change in its magnitude will generate an acceleration: CENTRIPETAL ACCELERATION . a G G c c a always points toward the center of the circula

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## This note was uploaded on 12/08/2011 for the course PHYSICS 125 taught by Professor Unknown during the Fall '08 term at University of Michigan.

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Lecture-09 - Circular CircularMotion Lecture#09 Ch.5.1 5.7...

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