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28 ) A 20-kg piece of steel pipe that is 20 cm in diameter, 80 cm long, is rolling toward you at a speed of 3.0 m/s. (a) What is the magnitude and direction of the pipe’s angular velocity vector  w ?   The pipe’s angular velocity is ____rad/s which acts to the (right or left)   b) What is the pipe’s rotational energy?   The rotational energy of the pipe is ___J     c) What is its total energy K + U^rot?

28 ) A 20-kg piece of steel pipe that is 20 cm in diameter, 80 cm long, is rolling toward you at a speed of 3.0 m/s. (a) What is the magnitude and direction of the pipe’s angular velocity vector  w ?   The pipe’s angular velocity is ____rad/s which acts to the (right or left)   b) What is the pipe’s rotational energy?   The rotational energy of the pipe is ___J     c) What is its total energy K + U^rot?

Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter13: Rotation Ii: A Conservation Approach
Section: Chapter Questions
Problem 17PQ
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28 ) A 20-kg piece of steel pipe that is 20 cm in diameter, 80 cm long, is rolling toward you at a speed of 3.0 m/s.

(a) What is the magnitude and direction of the pipe’s angular velocity vector  w ?

 

The pipe’s angular velocity is ____rad/s which acts to the (right or left)

 

b) What is the pipe’s rotational energy?

 

The rotational energy of the pipe is ___J

 

 

c) What is its total energy K + U^rot?

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