IMG_20190221_115536.jpg 38. The length of an elastic string is x meter when the tension is 8N and y meter when the tension is 10 N. The length in metre when the tension is 18 N is

Answers (1)
S safeer

stress=youngs modulas*strain

 8/A=Y*(X-L)/L....................(1)

10/A=Y*(y-L)/L....................(2)

18/A=Y*(Z-L)/L....................(3)

 (1)/(2)

solving we get L =5X-4y

 (3)/(2)

   9y-9L=5Z-5L

eliminating L

Z=5y-4X

Exams
Articles
Questions