The uniform 5-kg portion of a circular hoop is released from rest while in the position shown where the torsional spring of stiffness k_T = 15 N ∙ m/rad has been twisted 90° clockwise from its undeformed position. Determine the magnitude of the pin force at O at the instant of release. Motion takes place in a vertical plane and the hoop radius is r = 150 mm.

Transcribed Image Text:

kT TO