Here's why:

* Rest Position: The rest position of a spring is its equilibrium point. This is the position where the spring is neither stretched nor compressed.

* Potential Energy: At the rest position, the spring has its maximum potential energy. This is because the spring is not moving, and all its energy is stored as potential energy due to its compressed or stretched state.

* Kinetic Energy: Kinetic energy is the energy of motion. Since the spring is not moving at the rest position, its kinetic energy is zero.

* Energy Conversion: As the spring moves away from the rest position, its potential energy is converted into kinetic energy, causing it to move faster.

* Velocity and Displacement: Velocity is the rate of change of displacement. At the rest position, the displacement is zero, and the spring momentarily stops before changing direction.

Therefore, the spring's velocity is zero at the rest position, not maximum. The maximum velocity occurs when the spring passes through its rest position while moving from a stretched or compressed state.