

InterviewSolution
Saved Bookmarks
1. |
A simple spring has length l and force constant K. It is cut into two springs of lengths `l_(1) "and" l_(2)` such that `l_(1) = n l_(2)` (n = an integer). The force constant of spring of length `l_(1)` isA. k(1 + n)B. `((n+1)k)/(n)`C. kD. `k//(n+1)` |
Answer» Correct Answer - A Let k be the force constant of spring of length `l_(2)`. Since, `l_(2) = nI_(2)`, where n is an integer, `because" "l_(1)+l_(2)=l or nl_(2) + l_(2) = l` `therefore" "l_(2)=(l)/((n+1))" "because" "k_(1)l_(1)=k_(2)l_(2)` `therefore" "k_(2)l_(2)="k l"` `therefore" "k_(2)=kl//l_(2)=kl//(n+1)` pulting the value of `l_(2)` `= (n+1)k` |
|