Undergrad Energy Transfer Between Inertia Wheels

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To solve the problem of determining the final RPM of two inertia wheels connected by a clutch, the conservation of angular momentum is key. When the clutch engages, the total angular momentum before engagement must equal the total angular momentum after engagement. Given the known variables such as radius, kinetic energy, moment of inertia, and initial RPM, one can calculate the final RPM by setting up the equation based on these principles. If the bearings are efficient, they will not significantly affect the momentum transfer. This approach will yield the final RPM of both wheels once the clutch is engaged.
DrunkElk1601
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TL;DR
One flywheel is spinning and a 2nd flywheel is at rest. A clutch connects the shafts. What's the final rpm?
Been 20 years since college physics. I have a problem where there are basically two inertia wheels on separate shafts coupled by a clutch. One wheel is spinning and the other is at rest. The clutch engages and connects the shafts. What's the final rpm of both wheels? I'm struggling to find a similar problem to use an example. I know the radius, KE, moment of inertia, rpm, clutch engagement time, etc. but I'm not sure how to determine the final torque because it's not clear how to find the final rpm. If you would please describe the general approach or link a similar problem I'd appreciate it.
 

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Conservation of angular momentum.
 
If the bearings are good then you can use conservation of angular momentum
 

Thread 'Reference frames, center of rotation, etc'

Topic about reference frames, center of rotation, postion of origin etc Comoving ref. frame is frame that is attached to moving object, does that mean, in that frame translation and rotation of object is zero, because origin and axes(x,y,z) are fixed to object? Is it same if you place origin of frame at object center of mass or at object tail? What type of comoving frame exist? What is lab frame? If we talk about center of rotation do we always need to specified from what frame we observe?
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