If k is the force constant of a spring the work done [against restoring force] in increasing its extension from l_(1) to l_(2) will be

If k is the force constant of a spring the work done [against restorin

1.	If k is the force constant of a spring the work done [against restoring force] in increasing its extension from l_(1) to l_(2) will be
Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/k-527196" style="font-weight:bold;" target="_blank" title="Click to know more about K">K</a>(l_(2)-l_(<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>))`<br/>`K//2(l_(2)+l_(1))`<br/>`K(l_(2)^(2)-l_(1)^(2))`<br/>`(K)/(2)(l_(2)^(2)-l_(1)^(2))`</p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/4-311707" style="font-weight:bold;" target="_blank" title="Click to know more about 4">4</a></body></html>