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JEE Main Physics question

PhysicsMechanical Properties of SolidsJEE Main

A spring is extended by 30 mm when a force of 1.5 N is applied to it. Calculate the energy stored in the spring when hanging vertically supporting a mass of 0.20 kg, given that the spring was unstretched before the mass was attached.

Answer: (C)

Solution

. Under the 0.2 kg mass, extension $=mg/k =

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Question ID VK-154939