An engineer is designing a machine part consisting of three heavy disks linked by lightweight struts (Fig. 9.16). (a) What is the moment of inertia of this body about an axis through the center of disk A, perpendicular to the plane of the diagram? (b) What is the moment of inertia about an axis through the centers of disks B and C? (c) If the body rotates about an axis through A perpendicular to the plane of the diagram, with angular speed w = 4.0 rad/s, what is its kinetic energy? 9.16 An oddly shaped machine part. Axis passing through- disks B and C mg = 0.10 kg 0.50 m 0.30 m Axis passing through disk A 0.40 m mc=0.20 kg A mA = 0.30 kg