Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 13 (Q.No. 50)
50.
In the given figure, the maximum bending moment at the fixed end of the cantilever caused by the UDL is M. The bending moment at section 1/5 from the free end is
4%of M
5% of M
10%of M
20% of M
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Umesh H A said:   7 years ago
The answer is D.

At L/5 the Bending moment will become M/5. It's 20% of M

Harish Shetty said:   7 years ago
M = W L^2/2.
Bm @ L/5 = W (L /5)^2/2
= W L^2/50.

(Bm /M) *100 = 4%.

So, I think Option A is Correct.

Dan said:   5 years ago
B.M at fixed end = (wl^2)/2,
B.M at distance l/5= wl^2/50 = (BM at fixed end)/25,
Percentage = (M/25M)*100 = 100/25 = 4%.

Biswanath said:   1 year ago
Wl^2 = w/2 * l/5 * l/5.
= wl^2/50.
=wl^2/0÷wl^2/2 *100 = 4.

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