A solid disk of mass m1 = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of ω = 37 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk.

intial angular momentum of sys: 6.808
initial rotational energy of the system 125.948
fFINAL angular velocity of disk: 29.177
final angular momentum of sys: 6.808

What is the final rotational energy of the rod and disk system?

Question

A solid disk of mass m1 = 9.2 kg and radius R = 0.2 m is rotating with a constant angular velocity of ω = 37 rad/s. A thin rectangular rod with mass m2 = 3.7 kg and length L = 2R = 0.4 m begins at rest above the disk and is dropped on the disk where it begins to spin with the disk.

intial angular momentum of sys: 6.808
initial rotational energy of the system 125.948
fFINAL angular velocity of disk: 29.177
final angular momentum of sys: 6.808


What is the final rotational energy of the rod and disk system?