A bus is moving with a constant acceleration \( a=3 g / 4 \) towards right. In the bus, a ball i....

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A bus is moving with a constant acceleration \( a=3 g / 4 \) towards right. In the bus, a ball is tied with a rope of length
P
\( \ell \) and is rotated in vertical circle as shown.

At above a mentioned position, find the minimum possible speed \( \mathrm{V}_{\min } \) during whole path to complete the circular motion
(1) \( \sqrt{5 g \ell} \)
(2) \( \frac{5}{2} \sqrt{g \ell} \)
(3) \( \frac{\sqrt{5 g \ell}}{2} \)
(4) \( \sqrt{g \ell} \)


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