Two persons are holding a rope of negligible weight tightly at its ends so that it is horizontal. A 15 kg weight is attached to the rope at the mid point which now no longer remains horizontal. The minimum tension required to completely straighten the rope is:

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15 kg

15/2 kg

5 kg

infinitely large

answer is D.

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Detailed Solution

A horizontal force cannot balance a vertical force so minimum tension is infinitely large.

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