Mechanics...PLEASE HELP VERY SOON!!! Can someone please help me with this problem? I've been working on it for hours - anything would help thanks! A system consists of a uniform stick of length L and mass M hinged at one end. The hinge is released from rest at an angle theta_0 with respect to the vertical. Show that the radial force exerted on the stick F = Mg/2*(5 cos theta - 3 cos (theta_0), where theta is the angle of the stick with resect to the vertical after it is released. I tried to solve the problem using conservation of energy. I said potential energy is equal to the height that the center of mass has fallen, so I got: [(L/2)(sin_theta - sin theta_0)]Mg = 1/2Iw^2 = (1/2)(1/3)MR^2*w^2 ((L/2)sin_theta - sin theta_0)g = (1/6)R^2w^2 [3L (sin_theta - sin theta_0)g] / R^2 = w^2 v = wr, v^2 = w^2 * r^2 v^2 = [3L (sin_theta - sin theta_0)g] F = Mv^2 / R, which is not what they had. HELP!!