Civil Engineering - Strength of Materials - Discussion

Discussion Forum : Strength of Materials - Section 1 (Q.No. 34)
34.
The deflection of any rectangular beam simply supported, is
directly proportional to its weight
inversely proportional to its width
inversely proportional to the cube of its depth
directly proportional to the cube of its length
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
45 comments Page 5 of 5.

Mohit said:   4 years ago
D should be the correct answer, width and depth will change about the axis you are considering that is Ixx or Iyy but the length will be the same, so the answer should be option D.
(2)

Rajpal said:   3 years ago
Yes, option E is the right answer.

Abdullah said:   2 years ago
Both B and C are correct see the moment of inertia formula.
(1)

Arsalan gul said:   2 years ago
I think all of them are correct because in the deflation formula wL3/48EI where I= bh3/12.

Taba Tallum said:   2 months ago
Option A, B & C are correct in the case of a rectangular beam.

Deflection = 5wl4 ÷ 384EI for uploading,
= Wl^3÷48EI for point load etc.
Where I = bd^3/12.
Deflection is directly proportional to weight or load & length.
Deflection is inversely proportional to width and the cube of depth.


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