The assembly shown in the figure is made up of a disk, a bar, and a sphere. Disk A is pinned at O and has a weight of 18.0 lb. The 1-ft rod, weighing 2.7 lb, and the 1-ft-diameter sphere, weighing 11.5 lb, are welded to the disk as shown. A. Determine the mass moment of inertia of the assembly with respect to an axis perpendicular to the screen and passing through point O. Express the answer in slug.ft2 B.If the spring is initially deformed by 0.9 ft and the sphere is released from rest in the position shown, determine the elastic potential energy of the spring at the initial position. Express the answer in ft.lb. C. Determine the elastic potential energy of the spring when the entire assembly has rotated 45°. Express the answer in ft.lb. D.Determine the magnitude of the gravitational potential energy of the assembly when it has rotated 45°. Express the answer in ft.lb.
The assembly shown in the figure is made up of a disk, a bar, and a sphere. Disk A is pinned at O and has a weight of 18.0 lb. The 1-ft rod, weighing 2.7 lb, and the 1-ft-diameter sphere, weighing 11.5 lb, are welded to the disk as shown.
A. Determine the mass moment of inertia of the assembly with respect to an axis perpendicular to the screen and passing through point O. Express the answer in slug.ft2
B.If the spring is initially deformed by 0.9 ft and the sphere is released from rest in the position shown, determine the elastic potential energy of the spring at the initial position. Express the answer in ft.lb.
C. Determine the elastic potential energy of the spring when the entire assembly has rotated 45°. Express the answer in ft.lb.
D.Determine the magnitude of the gravitational potential energy of the assembly when it has rotated 45°. Express the answer in ft.lb.
E.
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