An ideal spring with spring constant K is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring initially unstretched. Then the maximum extension in the spring

Options

(a) 4 Mg/K
(b) 2 Mg/K
(c) Mg/K
(d) Mg/2K

Correct Answer:

2 Mg/K

Explanation:

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