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Chapter 1: Q3DQ (page 227)

A clothesline hangs between two poles. No matter how tightly the line is stretched, it sags a little at the center. Explain why.

Short Answer

Expert verified

Due to the involvement of the upward force, the weight of the clothesline gets counteracted, and it sags a little at the center.

Step by step solution

01

Significance of stretching

The stretching is described as the elastic property of a material to come back to its original shape even after elongation. The stretching is also called as elasticity as it comes back to its original shape.

02

Determination of the reason the clothesline sags at the center.

Due to action of the gravity, the net force on the clothesline act towards downward direction. Due to stretching, the tension in both sides of the clothesline changes, and eventually it reaches to a particular point where the clothesline counteracts the gravitational force by producing resultant force in the upward direction. Hence, the clothesline鈥檚 every part finally reaches to equilibrium and the net force on the clothesline becomes zero.

Thus, due to the involvement of the upward force, the weight of the clothesline gets counteracted and it sags a little at the center.

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