A bob of mass $\mathrm{M}$ is suspended by a massless string of length $\mathrm{L}$. The horizontal velocity $\mathrm{V}$ at position $\mathrm{A}$ is just sufficient to make it reach the point $B$. The angle $\theta$ at which the speed of the bob is half of that at $A$, satisfies Figure:
A bob of mass $\mathrm{M}$ is suspended by a massless string of length $\mathrm{L}$. The horizontal velocity $\mathrm{V}$ at position $\mathrm{A}$ is just sufficient to make it reach the point $B$. The angle $\theta$ at which the speed of the bob is half of that at $A$, satisfies Figure:
- [IIT 2008]
- A
$\theta=\frac{\pi}{4}$
- B
$\frac{\pi}{4}<\theta<\frac{\pi}{2}$
- C
$\frac{\pi}{2}<\theta<\frac{3 \pi}{4}$
- D
$\frac{3 \pi}{4}<\theta<\pi$
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