Rigid Body Kinetics

1. Nov 4, 2009

aolse9

1. The problem statement, all variables and given/known data

2. Relevant equations
$$\Sigma$$M = I$$\alpha$$
$$\Sigma$$F = ma

3. The attempt at a solution
I have made an attempt at this problem, it can be seen in the image below. I think I have done everything correctly, but my answer is incorrect. Any help would be greatly appreciated.

2. Nov 4, 2009

Any ideas?

3. Nov 4, 2009

aolse9

...no ideas. Come on guys I'm running out of time!