Need help with an angular momentum problem? I have it solved but apparently I'm wrong


Apr 2018
I've spent at least 1.5 hours on this problem trying to figure out what i did wrong and I can't find anything. With an exam in two days plus another chapter to go through.

Regardless, here are the problem(6) and answer, as well as my work. Hope you can read it, and the writing on the bottom left was just a variation of me using a positive value for m1(B/4) , as oppose to a positive like the right.

problem and answer:


Thank you very much. Also, any insight and tips about angular and circle stuff would be appreciated.

Also new here so...