A ring of mass $m$ is attached to a horizontal spring of spring constant $k$ and natural length $l_0$ . Other end of spring is fixed and ring can slide on a smooth horizontal rod as shown. Now the ring is shifted to position $B$ and released, speed of ring when spring attains it's natural length is
A ring of mass $m$ is attached to a horizontal spring of spring constant $k$ and natural length $l_0$ . Other end of spring is fixed and ring can slide on a smooth horizontal rod as shown. Now the ring is shifted to position $B$ and released, speed of ring when spring attains it's natural length is
- A
$\frac{{2{l_0}}}{3}\sqrt {\frac{k}{m}} $
- B
$\frac{{{l_0}}}{3}\sqrt {\frac{k}{m}} $
- C
$\frac{{3{l_0}}}{2}\sqrt {\frac{k}{m}} $
- D
${l_0}\sqrt {\frac{k}{m}} $
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