Two persons are holding a rope of negligible weight tightly at its ends so that it is horizontal.
Two persons are holding a rope of negligible weight tightly at its ends so that it is horizontal. A 15kg 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 :
(A) 15kg
(B) 15/2kg
(C) 5kg
(D) Infinitely large (or not possible)
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(D) Infinitely large (or not possible)
Explanation:
Let T be the tension in a string for equilibrium 2Tcosθ=mg string will be straight if θ=90 degree. and cosθ=0
T=mg/2 cosθ.
t=infinity
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