MHT CET Physics question
The length of a spring is and its force constant is k. When a weight W is suspended from it, its length increases by x. If the spring is cut into two equal parts and put in parallel and the same weight W is suspended from them. then the extension will be
Answer: (D)
Solution
Initially x = W/k; each half has force constant 2k and two halves in parallel give 4k, so the new extension is W/4k
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