A 2.85 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0330 m . The spring has force constant 870 N/m . The coefficient of kinetic friction between the floor and the block is 0.35 . The block and spring are released from rest and the block slides along the floor. A-What is the speed of the block when it has moved a distance of 0.0120m from its initial position?