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MHT CET Physics question

PhysicsMechanical Properties of SolidsMHT CET

A spring of force constant k is cut into 2 pieces such that one piece is double the length of the other. Then the long piece will have force constant given by

Answer: (C)

Solution

The pieces have lengths l/3 and 2l/3; force constant is inversely proportional to length, so the long piece has k' = k x l/(2l/3) = 3k/2,

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Question ID VK-067609