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Topics related to the given problem:
Dynamics of Rigid Bodies, Kinetics of a Particle, Equation of Motion: Normal and Tangential Coordinates, Kinematics, etc.
Thank you for your help.
Extracted text: The 3-kg disk D is attached to the end of a cord as shown in Fig. 13–13a. The other end of the cord is attached to a ball-and-socket joint located at the center of a platform. If the platform rotates rapidly, and the disk is placed on it and released from rest as shown, determine the time it takes for the disk to reach a speed great enough to break the cord. The maximum tension the cord can sustain is 100 N, and the coefficient of kinetic friction between the disk and the platform is µ̟ = 0.1. Motion of D platform 1m (a)