Foundation
Physics Foundation
Force and Newtons Law of Motion
Question
A bird of weight 5N sits at the mid-point of a clothesline. The line is so distorted that it makes 30° angles with the horizontal at each end as shown in figure. The tension in the clothesline is :
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Solution
By taking component of tension
in horizontal side
T cos 30º & T cos 30º are in
Opposite side to cancel each other.
In vertical side
T sin 30º + T sin 30º = 5N
2T sin 30º = 5N
2T () = 5N
T = 5N
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