The bob of a simple pendulum is displaced from its equilibrium position $O$ to a position $Q$ which is at height h above $O$ and the bob is then released. Assuming the mass of the bob to be $m$ and time period of oscillations to be $2.0\, sec$, the tension in the string when the bob passes through $O$ is
The bob of a simple pendulum is displaced from its equilibrium position $O$ to a position $Q$ which is at height h above $O$ and the bob is then released. Assuming the mass of the bob to be $m$ and time period of oscillations to be $2.0\, sec$, the tension in the string when the bob passes through $O$ is
- A
$m\,(g + \pi \sqrt {2g\,h} )$
- B
$m\,(g + \sqrt {{\pi ^2}g\,h} )$
- C
$m\,\left( {g + \sqrt {\frac{{{\pi ^2}}}{2}g\,h} } \right)$
- D
$m\,\left( {g + \sqrt {\frac{{{\pi ^2}}}{3}g\,h} } \right)$
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