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An elastic string of un stretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching is
  • a)
    1/2 Ky2
  • b)
    1/2 Ky(2x + y)
  • c)
    1/2 K(x2 + y2)
  • d)
    1/2 k (x + y)2
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
An elastic string of un stretched length L and force constant k is str...
In the string elastic force is conservative in nature.
∴ W = – ΔU
Work done by elastic force of string,
W = – (UF – Ui) = Ui – UF.


Therefore, the work done against elastic force 
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An elastic string of un stretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching isa)1/2 Ky2b)1/2 Ky(2x + y)c)1/2 K(x2 + y2)d)1/2 k (x + y)2Correct answer is option 'B'. Can you explain this answer?
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An elastic string of un stretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching isa)1/2 Ky2b)1/2 Ky(2x + y)c)1/2 K(x2 + y2)d)1/2 k (x + y)2Correct answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about An elastic string of un stretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching isa)1/2 Ky2b)1/2 Ky(2x + y)c)1/2 K(x2 + y2)d)1/2 k (x + y)2Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An elastic string of un stretched length L and force constant k is stretched by a small length x. It is further stretched by another small length y. The work done in the second stretching isa)1/2 Ky2b)1/2 Ky(2x + y)c)1/2 K(x2 + y2)d)1/2 k (x + y)2Correct answer is option 'B'. Can you explain this answer?.
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