Consider a block attached to horizontal spring that moves along a horizontal, frictionless surface. the system is the block and the spring. if the block is released from rest when the spring is stretched by a displacement of 4.50cm from its unstrained length, determine the displacement of the spring from its unstrained length when its translational speed is 2.00m/s. the mass of the block is 0.200kg and the spring constant of the spring is k=545n/m.