Solve the below problem:
Q: A half section of a uniform thin pipe of mass m is at rest when a force P is applied as shown. Assuming that the section rolls without sliding, determine
(a) Its initial angular acceleration,
(b) The minimum value of the coefficient of static friction consistent with the motion.
![234_Pipe.jpg](https://secure.tutorsglobe.com/CMSImages/234_Pipe.jpg)