(1) The spring tension increases gradually from the state that the solid
body keeps its position.
(2) The frictional force acts, and the solid body stays in the little
movement.
(3) At the stage where the spring tension exceeds fixing strength, the
solid body begins to slip.
(4) The spring tension decreases as the spring shortens its length.
(5) As the body decreases its speed, the frictional force begins increase,
and finally ceases its motion.
The above-mentioned process repeats its motion exactly
in the same manner.
