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Q.

A boy is hanging from a horizontal branch of a tree. The tension in the arms will be maximum, when the angle between the arms is

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a

00

b

300

c

600

d

1200

answer is D.

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Detailed Solution

2T cosθ = wT = w/2cosθT is maximum when 2cosθ = 12cosθ = 1θ = 600; 2θ = 1200
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