A block of mass 2 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…

A block of mass $\displaystyle 2$ 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 $\displaystyle 2$ m and spring constant is $\displaystyle 200 \mathrm{~N} / \mathrm{m}$. The block is pushed such that the length of the spring becomes $\displaystyle 1$ m and then released. At distance $\displaystyle x \mathrm{~m}(x<2)$ from the wall, the speed of the block will be