F13-3. A spring of stiffness k 500 N/m is mounted against the 10-kg block. If the block is subjected to the force of F 500 N, determine its velocity at s = 0.5 m. When s=0, the block is at rest and the spring is uncompressed. The contact surface is smooth. F = 500 N F13-3 k = 500 N/m