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i am not able to understand the concept behind this question. please explain

i am not able to understand the concept behind this question. please explain 

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Grade:12th pass

1 Answers

Amrit Raj
46 Points
6 years ago
On drawing the horizontal and vertical componets of force ,the vertical componet Tsin∂ +Tsin∂ =2Tsin∂, (Where ∂ is the angle made by the rope with horizontal)will be responsible to balance the weight.
we have the eqn........... 2Fsin∂=W
                          =>F=W/sin∂
To straighten the rope...........  ∂ should be ‘0’.
=>sin∂=-0.
=>F=Infinity.

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