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The mass on a loaded spiral spring oscillates v... - WAEC Physics 2003 Question

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 option: d
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