Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 9 (Q.No. 24)
24.
If all the dimensions of a prismatic bar of square cross-section suspended freely from the ceiling of a roof are doubled then the total elongation produced by its own weight will increase
Discussion:
8 comments Page 1 of 1.
Anshu said:
7 years ago
We know the change in length in the prismatic bar due to self-weight is YL^2/2E.
So, L becomes double so the value will be increased by four times.
So, L becomes double so the value will be increased by four times.
Lakhan said:
7 years ago
Thanks @Anshu.
Swasan Toshin said:
6 years ago
Yeah, that's right. Thanks @Anshu.
Chauhan Thundu said:
5 years ago
Why we not use Wl/2AE?
Please explain anyone.
Please explain anyone.
Shubham said:
5 years ago
When self weight or own weight, out of both one word used in question so used YL^2/2E.
Vinod said:
5 years ago
What about it's stress?
Prashant said:
5 years ago
@Chauhan Thundu.
But what if we use WL/2AE? Please explain.
But what if we use WL/2AE? Please explain.
Tarun said:
5 years ago
Here, it's talking about keeping self-weight same so if we increase cross-section the weight will automatically increase. So here to keep weight same we use specific weight instead of its own weight.
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