A disk of mass 200g can rotate on a pivot point through the center of the disk and is attached to a torsion spring. The disk is rotating with simple harmonic motion with an angular amplitude of 0.3 radians and a total energy of Etot. In terms of Etot, how much kinetic energy does the mass have when it is 0.1 radians from the equilibrium position? 

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Finding the Treasure We can solve this problem by treating each displacement as a vector and then fi... View the full answer