If rod OA of negligible mass is subjected to the couple moment M = 9 N•m, determine the an...

If rod OA of negligible mass is subjected to the couple moment M = 9 N•m, determine the angular velocity of the 10-kg inner gear t = 5 s after it starts from rest. The gear has a radius of gyration about its mass center of kA = 100 mm, and it rolls on the fixed outer gear, B. Motion occurs in the horizontal plane.