# Need help with an angular momentum problem...

Tags:
1. Apr 21, 2018

### EngAM

1. The problem statement, all variables and given/known data
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 in red was just a variation of me using a negative value for m1(B/4) , as oppose to a positive like the right.

2. Relevant equations / work

https://imgur.com/a/C440LPp

work:

https://imgur.com/a/A0KP8VU

Thank you very much

Also, I'm new here so i don't know how embed images.

Problems:

Left side of board:

Right side of board:

Last edited: Apr 21, 2018
2. Apr 21, 2018

### Staff: Mentor

Welcome to the PF.

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3. Apr 21, 2018

### EngAM

Hopefully you can read it now? Sorry, my camera quality is just poor. But like I said, I feel like I "solved" it right conceptually, i feel like it might be somewhere in my work that's wrong. I know there shouldn't be any torque so angular momentum is conserved, which is why I said total initial momentum (I add the momentums of the separate ants together right) is equal to the total final momentum.