A massless spring gets elongated by amount x under a tension of 5N. Its elongation is x2 under the

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🧑‍🏫 Author: Aditya Bhatt Sir   |   🕒 Last Updated: July 13, 2025

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📘Question

A massless spring gets elongated by amount x1 under a tension of 5N. Its elongation is x2 under the tension of 7N. For the elongation of (5×1 – 2×2 ), the tension in the spring will be, 

(1) 15 N 

(2) 20 N 

(3) 11 N 

(4) 39 N     (JEE-2025) 

✅ Answer

A massless spring gets elongated by amount x1 under a tension of 5N. Its elongation is x2 under the tension of 7N. For the elongation of (5x1 – 2x2 ), the tension in the spring will be,  (1) 15 N  (2) 20 N  (3) 11 N  (4) 39 N

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