Lessons

Eamcet Physics
1 st year : Unit 2.5 (Kinematics) - Vector Addition

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Q.

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

View Answer

Correct choice: D

Explanation:

P = Q = R
∴ R2 = P2 + Q2 + 2PQ cos θ
or R2 = R2 + 2R2 cos θ ,cos θ = -1/2
θ = 120°
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