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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

The length of an elastic spring is metres when a force of 4 N is applied, and metres when a 5 N force is applied. Then the length of the spring when a 9 N force is applied is [J & K CET 2003]

Answer: (C)

Solution

Let be the natural length and the spring constant: length . From and

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Question ID VK-154864