A block of mass \( 2 \, \text{kg} \) is attached to one end of a massless spring whose other end is fixed at a wall. The spring-mass system moves on a frictionless horizontal table. The spring's natural length is \( 2 \, \text{m} \) and spring constant is \( 200 \, \text{N/m} \). The block is pushed such that the length of the spring becomes \( 1 \, \text{m} \) and then released. At distance \( x \, \text{m} \) (\( x < 2 \)) from the wall, the speed of the block will be:
