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 = 2.2 lb/ft. (Figure 1) Part A Determine its unstretched length so that it does not allow the block to leave the surface until 8 = 60° Express your answer to three significant figures and include the appropriate units. H HÀ 10 = Value • • • Ea ? Units Submit Request Answer Figure < 1 of 1 > Provide Feedback W