Question

The graph shown represents the potential energy U as a function of displacement x for an object on the end of a spring moving back and forth with amplitude x₀. Which of the following graphs represents the kinetic energy K of the object as a function of displacement x?

Answer 1

Correct option

  

As the object oscillates its total mechanical energy is conserved and transfers from U to K back and forth. The only graph that makes sense to have an equal switch throughout is D.