A 0.500-kg block is attached to a horizontal spring that is at its equilibrium length (Natual length), and whose force (spring) constant is 25.0 N/m . The block rests on a frictionless surface. A 6.00102-kg wad of putty is thrown horizontally at the block, hitting it with a speed of 2.00 m/s and sticking. Part A Process 1: The collision between the block and the putty. What is the common final speed of the Block + Putty immediately after the collision