A single rolling load rolls from end A to B on a 15 m long bamboo beam AB. If the rolling load is of 8 kN, the maximum bending moment will be
- A8 kNm
- B15 kNm
- C30 kNmCorrect
- Dnone of the above
Solution
Concept
Maximum moment for a single rolling load
Formula
M = WL/4
Step-by-step solution
1. M = 8 × 15/4 = 30 kN·m at mid-span.
Explanation
The maximum moment occurs under the load at mid-span.
Why the other options are wrong
8 and 15 are not WL/4.
Shortcut
WL/4.
Correct answer: C) 30 kNm