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Answer:

B is an answer.

Stress on nylon string is 3.14 × 10⁷ N/m²

Explanation:

Given:

Diameter of nylon string = 2 mm

Pulled force = 100 Newton

Find:

Stress on nylon string

Computation:

Radius of string = 2 / 2 = 1 mm

Stress = Force / Area

Stress on nylon string = 100 Newton / (πr²)

Stress on nylon string = 100 / [(3.14)(1)²]

Stress on nylon string = 3.14 × 10⁷ N/m²

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