The mass on a loaded spiral spring oscillates vertically between two extreme positions P and R equidistant from the equilibrium position Q. Which of the following statements about the system is not correct

A. the momentum of the mass is maximum at Q
B. the elastic potential energy of the spring is maximum at Q
C. the kinetic energy of the mass is maximum at P
D. the total energy of the system is always constant

Correct Answer: Option D

D. the total energy of the system is always constant