An object of mass m-1 kg is hinged at its left end. The center of mass of the object is located 1.3 m from the hinge, as shown at right. Its moment of inertia around the hinge is 3.0 kg-m. The hinge is frictionless: it can exert forces but not torques. The object is released from rest at some angle 0>0 at time t-0. Later, when 0-0, the centripetal acceleration of the object's center of mass is 7.8 m/s'. 2) Use energy methods to determine the initial angle 0

An object of mass m-1 kg is hinged at its left end. The center of mass of the object is located 1.3 m from the hinge, as shown at right. Its moment of inertia around the hinge is 3.0 kg-m. The hinge is frictionless: it can exert forces but not torques. The object is released from rest at some angle 0>0 at time t-0. Later, when 0-0, the centripetal acceleration of the object's center of mass is 7.8 m/s'. 2) Use energy methods to determine the initial angle 0