Use app×
QUIZARD
QUIZARD
JEE MAIN 2026 Crash Course
NEET 2026 Crash Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
167 views
in Physics by (86.7k points)
closed by
Length of an elastic string is x then tension 5N is applied and its length will be y when tension 7 N. What will be its original length ?
A. `(2x+y)/(2)`
B. `(2y-yx)/(2)`
C. `(7x-5y)/(2)`
D. `(7y+5x)/(2)`

1 Answer

0 votes
by (85.0k points)
selected by
 
Best answer
Correct Answer - C
`x=L+l_(1) " "therefore l_(1)=x-L`
`y= L+l_(2) " " therefore l_(2) =y-L`
`(F_(2))/(l_(2))=(F_(1))/(l_(1))`
`(7)/(y-L)=(5)/(x-L)" " therefore L=(7x-5y)/(2)`

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...