Suppose the rod is held at rest horizontallyand then released. (throughout the remainder of this problem, youranswer may include the symbol i, the moment of inertia of the assembly, whether or not you haveanswered the first part correctly.)
what is the angular acceleration alpha of the rod immediately after it is released?
take the counterclockwise directionto be positive.
express alpha in terms of some or all of the variables m_r, m_1, m_2, l, i,and g.