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A mass is suspended on a vertical spring. initially, the mass is in equilibrium. then, it is pulled downward and released. the mass then moves up and down between the "top" and the "bottom" positions. by definition, the period of such motion is the time interval it takes the mass to move:

User Monitorjbl
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A mass suspended from a spring is pulled down a distance of 2 ft from its rest position, as shown in the figure. The mass is released at time t=0
and allowed to oscillate. If the mass returns to this position after 1 s, find an equation that describes its motion.
User Bitgarden
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