720_Dynamics 11ed Manual

720_Dynamics 11ed Manual - Engineering Mechanics - Dynamics...

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Engineering Mechanics - Dynamics Chapter 21 I xy 0 a y 2 m a 2 h ha y () y ay 2 d = 1 12 a 4 m a 2 = I xy 1 12 a 2 m = *Problem 21-8 Determine the radii of gyration k x and k y for the solid formed by revolving the shaded area about the y axis. The density of the material is ρ . Given: a 4f t = b 0.25 ft = 12 slug ft 3 = Solution: M 0 b y ρπ a 2 d b a y a 2 b 2 y 2 d + = M 292.17 slug = I x 0 b y a 2 4 y 2 + π a 2 d b a y a 2 b 2 4 y 2 y 2 +
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This note was uploaded on 08/16/2011 for the course EGN 3321 taught by Professor Christianfeldt during the Spring '08 term at University of Central Florida.

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