In the figure is shown a spring-mass system oscillating in uniform ...

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In the figure is shown a spring-mass system oscillating in uniform gravity. If we neglect all dissipative forces, it will keep on oscillating
(1) endlessly with constant amplitude and frequency. Accompanying graph shows how displacement \( x \) of the block from the equilibrium position varies with time \( \mathrm{t} \).
(2)
(3)
Now at a certain instant \( t=t_{0} \) when the block reaches its lowest position, gravity is switched off by some unknown mechanism. Which of the following graphs would correctly describes the
(4) changes taking place due to switching off the gravity?
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