248_Problem CHAPTER 9

248_Problem CHAPTER 9 - PROBLEM 9.172 For the wire figure...

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PROBLEM 9.172 For the wire figure of the problem indicated, determine the mass moment of inertia of the figure with respect to the axis through the origin characterized by the unit vector ( ) 362/ 7 . =− − + ijk λ Problem 9.150 SOLUTION Mass of each leg is identical: / WL mL g  =   ( ) 2 2 0.041lb/ft 1.5 ft 0.00190994 lb s /ft 32.2 ft/s == Also, 0 xy yz zx III ′′ === for each leg, and 16 4 5 6 123 00 0 xx y y y zz z Now () 222 333 xy x y I Im x y m x y m x y + = + ( ) ( ) 22 0.00190994 lb s /ft
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