• A solid disk of mass m₁= 9.4 kg and radius R = 0.24 m is rotating with a constant angular velocity of  = 35 rad/s. A thin rectangular rod with mass m₂= 3.1 kg and length L = 2R = 0.48 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk.
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• 1)What is the initial angular momentum of the rod and disk system?
•  2)What is the initial rotational energy of the rod and disk system?
• 3) What is the final angular velocity of the disk?
• 4) What is the final angular momentum of the rod and disk system? 5)What is the final rotational energy of the rod and disk system?
•  6) The rod took t = 5.5 s to accelerate to its final angular speed with the disk. What average torque was exerted on the rod by the disk? 
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