A weight $M g$ is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is ......
A weight $M g$ is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is ......
- A
$\frac{M g}{2}$
- B
$M g \cos \theta$
- C
$2 M g \cos \theta$
- D
Infinitely large
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