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Q.

A ball is held at rest in position A and another identical ball is released from rest in position B. The ratio of tension $T_{1}$ and $T_{2}$ is: (string connecting wall and ball A is horizontal)

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a

1

b

$\frac{3}{4}$

c

$\frac{4}{3}$

d

$\frac{1}{2}$

answer is C.

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Detailed Solution

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$T_{1} \cos 30 ° = m g$ and $T_{2} = m g \cos 30 °$
$\frac{T_{1}}{T_{2}} = \sec^{2} 30 ° = \frac{4}{3}$

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