The spring has a stiffness k = 50 N/m and an unstretched length of 0.3 m. It is attached to the 3.4-kg smooth collar and the collar is released from

rest at A (theta = 0°). The motion occurs in the horizontal plane Neglect the size of the collar.(Figure 1) \text { Determine the speed of the collar when } \theta=60^{\circ}