Problem $3$ The Charpy Impact test is used in materials testing to determine the energy absorption characteristics of a material during impact. This test is performed by releasing a $60lb$ pendulum and allowing it to strike specimen at degrees$).$ The pendulum has a mass moment of inertia $I_A=9\mathrm{.}43$ slug$-f{t}^2$ about pin A $.$ Find the reactive forces $A_n$ and $A_5$ :

A$)$ Just after pendulum is released

B$)$ Just before pendulum strikes specimen

HINT: You must use kinematic relation $d=d$ as a $4^{th}$ equation

$($b$)$