A block of mass 10  kg is dropped from a height of 10  m from the earth's surface and it falls on...

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A block of mass 10  kg is dropped from a height of 10  m from the earth's surface and it falls onto a vertical helical spring of stiffness 5000  N / m and length 50  cm as shown in the figure. The compression of the springs is (take, g=10  m / s^2 )
(a) 0.1  m
(b) 0.2  m
(c) √(0.4) m
(d) 0.3  m

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