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
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![A spring balance, which is suspended from the roof of a lift, carries a mass of 1kg at its free end. If the lift accelerates upwards at 2.5ms‾², determine the reading on the spring balance. [g = 10ms‾²]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A spring balance, which is suspended from the roof of a lift, carries a mass of 1kg at its free end. If the lift accelerates upwards at 2.5ms‾², determine the reading on the spring balance. [g = 10ms‾²]")
