A ball of mass 100 g is dropped from a height h = 10 cm on a platform fixed at the top of vertical spring (as shown in figure). The ball stays on the platform and the platform is depressed by a distance
. The spring constant is________Nm -1 . (Use g = 10 ms -2 )

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Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(120)
By energy conservation PE = KE




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