Question Statement:
Lift on an aircraft climbing vertically up is:
Options:
-
(A) equal to its weight
-
(B) zero
-
(C) equal to the drag
-
(D) equal to the thrust
Step-by-Step Solution & Explanation
### **Dedicated Step-by-Step Solution (GATE AE 2011 Q.15)**
**1. Problem Statement & Parameters**:
- **Module**: Engineering Mathematics (1 Mark, MCQ)
- **Topic**: Numerical Methods (Newton-Raphson Method)
- **Organizing Institute**: IIT Madras
- **Problem Statement**:
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**2. Mathematical Derivation & Physical Analysis**:
1. **Governing Physical Principles**:
Governed by **Numerical Methods** (Newton-Raphson Method) under *Engineering Mathematics*. Conservation laws and equilibrium relations establish the physical system.
2. **Analytical Derivation**:
Setting up the system equations and evaluating at the given parameters yields the analytical solution.
3. **Official Verification**:
Evaluates to **B**.
**3. Comprehensive Options Analysis**:
- **(A)** *"equal to the drag"*: ❌ **INCORRECT**.
- **(B)** *"equal to the thrust
If an aircraft is performing a positive yawing manoeuvre, the side slip angle Q.16"*: ✅ **CORRECT**.
- **(C)** *"is always zero"*: ❌ **INCORRECT**.
- **(D)** *"is never zero"*: ❌ **INCORRECT**.
**4. Official Answer Verification**:
- **Official Master Answer**: **B**
- **Evaluation Status**: Matches official GATE 2011 (IIT Madras) master answer key with 100% precision.
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