Currently studying for a physics final on Wednesday 12/12/12
The problem can be found here
Not very sure.
The Attempt at a Solution
I have no idea how to do a. I've tried
But it just comes to 0.
I've thought about it and the only possible way to get the answer given that I can think of is this:
Does this involve angular momentum as well? Or inertia? Any help would be gratefully appreciated!