Problem 4 General Planar Motion, Kinetics: The Charpy Impact test is usedin materials testing to determine the energy absorption characteristics of a material during impact. This test is performed by releasing a 60 lb pendulum and allowing itto strike specimen at S (0 = 45 degrees). The pendulum has a mass moment of inertia là = 9.43 slug-ft² about pin A. Find the reactive forces A₁ and At: A) Just after pendulum is released B) Just before pendulum strikes specimen

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