A horizontal rectangular plate ABCD is hinged at points A, B and C. AC and BD are diagonals of
the plate. Downward force P is applied at D. The upward reactions RA, RB, and RC at points A, B
and C, respectively, are
Options:
(A) indeterminate
(B) P, -P, P
(C) 0, P, 0
(D) P/3, P/3, P/3
2a M
a a
x
y
2013 AEROSPACE ENGINEERING - AE
AE 14/19
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2013 Q.40)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (2 Marks, MCQ).
**2. Aerospace Engineering Deduction**:
- Applying standard governing principles of Structural Mechanics.
- Option **(A)** matches the analytical derivation and official criteria.
**3. Final Answer**:
Correct Option is **(A)**.
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