Moment of Inertia: Disk 1 & 2 Homework

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SUMMARY

The discussion centers on calculating the moment of inertia of Disk 2, which has an unknown value, after it collides with Disk 1. Disk 1 has a moment of inertia of 4.40 kg·m² and rotates counterclockwise at 7.50 rad/s. After the collision, both disks rotate together clockwise at 1.40 rad/s. The conservation of angular momentum is the key principle applied, represented by the equation L = Iω, where L is angular momentum, I is moment of inertia, and ω is angular speed.

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Mia
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Homework Statement


In the diagram, Disk 1 has a moment of inertia of 4.40 kg · m2 and is rotating in the counterclockwise direction with an angular speed of 7.50 rad/s about a frictionless rod passing through its center. A second disk rotating clockwise with an angular speed of 9.50 rad/s falls from above onto Disk 1. The two then rotate as one in the clockwise direction with an angular speed of 1.40 rad/s. Determine the moment of inertia of Disk 2.

Homework Equations


L=Iω

The Attempt at a Solution


I have no idea how to start the problem.
 
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Mia said:
I have no idea how to start the problem.
Any conservation laws you can think of that might apply?
 

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