1. A horizontal spring with a spring constant of k = 35 N/m is attached to a wall. A 0.27-kg block is attached to the free end of the spring as shown. There is negligible friction between the block and the surface. The block is pushed to the left so that the spring compresses to Ax = -20 cm from its equilibrium position and then released from rest. Use the work-energy theorem to calculate the speed of the block as it passes through the equilibrium position. www ww Equilibrium position x = 0 -x