defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Laws of Motion

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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