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Two persons are holding a rope of neglig...

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 rope at the midpoint which now no more remains horizontal. The minimum tension required to completely straighten the rope is

A

150 N

B

75 N

C

50 N

D

Infinitely large

Text Solution

Verified by Experts

The correct Answer is:
D
`T=F, 2Tcos thetamg`
To make rope straight, `theta=90^(@)`
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Knowledge Check

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

    A
    15kg
    B
    `15//2kg`
    C
    5kg
    D
    Infinitely large

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    A
    It is still about to slide down the plane
    B
    It will not slide down the plane unless the inclination is increased
    C
    It will not slide down the plane unless .the inclination is decreased .
    D
    It will never slide down whatever be the inclination

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    A
    `(F)/(l)`
    B
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    C
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