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प्रश्न
An ideal spring of spring constant k, is suspended from the ceiling of a room and a block of mass M is fastened to its lower end. If the block is released when the spring is un-stretched, then the maximum extension in the spring is
विकल्प
`4"Mg"/"k"`
`"Mg"/"k"`
`2"Mg"/"k"`
`"Mg"/(2"k")`
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उत्तर
`2"Mg"/"k"`
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