A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800
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A disk, with a radius of 0.25 m, is to be rotated like a merry-go-round through 800 rad, starting from rest, gaining angular speed at the constant rate α1 through the first 400 rad and then losing angular speed at the constant rate -αl until it is again at rest. The magnitude of the centripetal acceleration of any portion of the disk is not to exceed 400 m/s2.
(a) What is the least time required for the rotation?
(b) What is the corresponding value of α1?
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a The upper limit for centripetal acceleration same as th...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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