00:02
Hello students, in this problem we want to find the elongation produced in the wire.
00:06
It is given that length l equal to 12 meter and area a equal to 1 .25 into 10 to minus 6 meter square and added weight m equal to 5 .5 kilogram and the young small less y equal to 5 .10 to 11 newton per meter square.
00:30
And here we take acceleration due to gravity g as 10 meter per second square.
00:36
We have the applied force f, that is equal to mg.
00:42
Just substitute all the values, that is 5 .5 into 10, which is equal to 55 newton.
00:50
Then we have stress equal to force by area, that is equal to 55.
01:03
Divided by 1 .25 into 10 to the power minus 6, which is equal to 44 into 10 to the power 6, no 10 per meter square.
01:15
Then we have y -smodlus y equal to stress divided by strain...