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Spring with lengths under two tensions: tension needed for a combined length such as 3a - 2b

The same question, asked 2 times: 4 Apr 2024*, 23 Jan 2025. Every wording below, oldest first.

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  1. Question 1

    4 Apr 2024

    28
    An elastic spring under tension of 3 N3\text{ }N has a length a. Its length is bb under tension 2 N2\text{ }N. For its length (3a−2b)(3a - 2b), the value of tension will be ____ NN.

  2. Question 2

    23 Jan 2025

    95
    A massless spring gets elongated by amount X1X_{1} under a tension of 5 N . Its elongation is x2x_{2} under the tension of 7 N . For the elongation of (5x1−2x2)\left( 5x_{1}- 2x_{2} \right), the tension in the spring will be,

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