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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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NARAYNA-LAW OF MOTION-EXERCISE - II (C.W)(OBJECTS SUSPENDED BY STRINGS AND APPARENT WEIGHT)
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  5. A monkey of mass 40 kg climbs on a massless rope of breaking strength ...

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  6. Two persons are holding a rope of negligible weight tightly at its end...

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  7. A straight rope of length 'L' is kept on a frictionless horizontal sur...

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  8. Consider three blocks of masses m(1), m(2), m(3) interconnected by str...

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  9. A railway engine of mass 50 tons is pulling a wagon of mass 40 tons wi...

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  10. In the following figure, the pulley is massless and frictionless. Ther...

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  11. Two identical blocks each of mass ''M'' are tied to the ends of a stri...

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  12. In the given arrangement, n number of equal masses are connected by st...

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  13. A 40 N block is supported by two ropes. One rope is horizontal and the...

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  14. The pulley arrangements shown in figure are identical, the mass of the...

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  15. Two masses of 10 kg and 5 kg are suspended from a rigid support as sho...

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  16. Two bodies of masses 3kg and 2kg are connected by a long string and th...

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  17. A block of mass 3kg which is on a smooth inclined plane making an angi...

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  18. If m(1) = 10kg, m(2)= 4kg, m(3)= 2kg, the acceleration of system is

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  19. The string between blocks of masses 'm' and '2m' is massless and inext...

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  20. All surfaces are smooth. The acceleration of mass m relative to the we...

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