A massless spring gets elongated by amount ${x}_{1}$ under a tension of 5 N . Its elongation is ${x}_{2}$ under the tension of 7 N . For the elongation of $\left(5{x}_{1}-2{x}_{2}\right)$, the tension in the spring will be:

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A massless spring gets elongated by amount \({x}_{1}\) under a tension of 5 N . Its elongation is \({x}_{2}\) under the …

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