energy-spring-1b.iwp
When you play the animation, the block oscillates horizontally about the origin on a frictionless table. The origin is in the center and the direction of +x is to the right. The oscillation is the result of a Hooke's Law force applied by the spring to the block. The system is taken to be the block and spring. (Gravitational and normal forces do no work on the block.)
Which one of the energy bar diagrams (A,B,C,D) represents how the kinetic energy (blue), elastic potential energy (red), and total system energy (green) change as a function of time?