When a mass $m$ is attached to a spring, it normally extends by $0.2\, m$. The mass $m$ is given a slight addition extension and released, then its time period will be
When a mass $m$ is attached to a spring, it normally extends by $0.2\, m$. The mass $m$ is given a slight addition extension and released, then its time period will be
- A
$\frac{1}{7}\, sec$
- B
$1\, sec$
- C
$\frac{{2\pi }}{7}\,sec$
- D
$\frac{2}{{3\pi }}\,sec$
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