<Ch 13 Sect 13.5-13.6 Problem 13.84 The 2-lb block is released from rest at A slides down along the smooth cylindrical surface. The attached spring has a stiffness k = 2 lb/ft. (Figure 1) Part A Determine its unstretched length so that it does not allow the block to leave the surface until 0 = 60°. Express your answer to three significant figures and include the appropriate units. MÅN O ? Figure 1 of 1 > Value Units Submit Request Answer < Return to Assignment Provide Feedback WA