The graphs in fugure show that a quantity `Y` varies with displacement `d` in a system undergoing simple harmonic motion.
(I) ,
The time
A. `I`
B. `II`
C. `III`
D. `IV`

The graphs in fugure show that a quantity `Y` varies with displacement `d` in a system undergoing simple harmonic motion.
(I) ,
The unbalanced force acting on the system.
A. `I`
B. `II`
C. `III`
D. None

The graphs in fugure show that a quantity `Y` varies with displacement `d` in a system undergoing simple harmonic motion.
(I) ,
Which graphs best represents the relationship obtained when `y` is
The total energy of the system
A. `I`
B. `II`
C. `III`
D. `IV`