Question

2. 0/2 POINTS PREVIOUS ANSWERS NORENGSTATICS1 8.P.102. A body consists of two perpendicular rods rigidly attached as shown. Each rod has length L = 3.8 ft and weighs W = 9.10 lb. 3.8 ft |194-*1967 Find the mass moment of inertia in lb.s2.ft of the assembly about an axis through point o directed perpendicular to the plane of the page. 1 x lb.s2.ft Find the radius of gyration in feet of the assembly about an axis through point o directed perpendicular to the plane of the page. X ft

Answer 1

solution : - L=3.8ft W = 9.1016 109 308 Help log 1.9 X 3.8 mass moment of inertia of each Eod about an axis through their crep and peopenticular to pasge - Icy - mb* = *3.82 - = 0.3400 lbsoff 12 Now a about maxis mass moment of inertia through o directed perpendically to the blame of page = 2 Iciet mxloq2 + m x 3.82 Io = 2 x 0.3400 + 13 x (1992+ 3082) = 15 78 lbsaft Eaders of gysation k = 1 I = ( 5 72 x 4 5.78x46 = 130198 ft / V 2 13 &