Mechanics II Exam...

Today I am taking the last paper of the year-Mechanics II.Quite a alright paper as I only need to pass this paper to pass overall.But problem start in Section B question 2.I forget how to count the "W" with is the omega of the wheel.Without this answer,it will affect the following questions.Moreover,this one of the main question in the paper.Let's hope the frog-spirit is by my side to bless me on all my exams.
Ok,I can finally relax for the moment before my attachment start next week.