Physics, asked by chinnu41, 1 year ago

(a boy is hanging from a horizontal branch of a tree . find the angle between the arms So that tension in the arms to be maximum)

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Answered by kumarysunil

We can simplify the system by assuming the boy to be a box hung by two strings making an angle between them.

Let angle between the strings be 2a
and tension in them be T (it wil be same in both due to symmetry)
Thus total force due to tension balancing the mass of block will be:

2T cos a = mg
T = mg/(2 cos a)
for minimum T we differentiate it with a.

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chinnu41: pls send it once again it is saying answer doesnt exist

kumarysunil: i will write it here

kumarysunil: one min.

chinnu41: ok

kumarysunil: dT/da = - (-sin a) mg/2cos sq a =0

kumarysunil: therefore a = 0

chinnu41: wrong it is 120

kumarysunil: is there any no. kg in the question

chinnu41: no that is question

chinnu41: u have done it for min tension but it is for max tension

Answered by 00Sakaham00

Answer:

Explanation:

Hope it will help u, 90° is not possible only when u imagine the situation.

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