1. The problem statement, all variables and given/known data A uniform rod of length 1.4 m is attached to a frictionless pivot at one end. It is released from rest from an angle θ = 23° above the horizontal. Find the magnitude of the initial acceleration of the rod's CM. 2. Relevant equations At = alpha * r 3. The attempt at a solution I am reviewing old homework problems for my test tomorrow so I just have a few questions.... What is CM? Also is At known as initial acceleration not Ac?