lecture08 - Comparison of Linear and Angular motion with...

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Comparison of Linear and Angular motion with Constant Acceleration Straight-line motion Fixed-axis rotation t v v x x x x a v v t a t v x x t a v v const a x x x x x x x x x x x x ) ( ) ( 2 0 2 1 0 0 2 0 2 2 2 1 0 0 0 t t t t const z z z z z z z z z z ) ( ) ( 2 0 2 1 0 0 2 0 2 0 2 2 1 0 0 0   
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Example : At t = 0, a grinding wheel has an angular velocity of 24.0 rad/s. It has an constant angular acceleration of 30.0 rad/s 2 until a circuit breaker trips at t = 2.00 s. From then on, it turns through 432 rad as it coasts to a stop at constant angular acceleration. What was its acceleration as it slowed down? 1) Angular speed at 2 s :    s rad s s rad s rad t z z / 84 00 . 2 / 0 . 30 / 0 . 24 2 0    2 2 2 0 2 / 17 . 8 432 2 / 84 0 2 s rad rad s rad z z z  ) ( 2 0 2 0 2 0  z z 2) Angular acceleration:
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Question: A particle is going around in a circle of radius 2.0 m.
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This note was uploaded on 10/21/2010 for the course PHYS 221 taught by Professor Herrera-siklody during the Fall '08 term at Iowa State.

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lecture08 - Comparison of Linear and Angular motion with...

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