🧷 Authentic Classroom Explanation by IAS Monk

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📌 The Question:

Consider the following statements:

1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.
2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

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✅ Answer: (d) Neither 1 nor 2

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🧑‍🏫 Classroom Explanation:

Statement 1 — Incorrect

• Ballistic missiles are rocket-powered only in the initial boost phase.
  After that, they follow a ballistic (free-fall) trajectory outside the atmosphere.
• Cruise missiles are self-propelled throughout most of their flight, usually using jet engines, and fly within the atmosphere.

Hence, the propulsion description is reversed and incorrect.

Statement 2 — Incorrect

• Agni-V is not a cruise missile. It is a long-range ballistic missile (not medium-range).
• BrahMos is not a ballistic missile. It is a supersonic cruise missile, powered by a ramjet engine, flying at Mach 2.8–3.

Therefore, both statements are incorrect.

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🔍 Curiosity Raiser:

🚀 Why are ballistic missiles easier to detect than cruise missiles, yet harder to intercept once launched?

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📚 Enrichment Notes (UPSC Edge):

• Ballistic Missiles
  • Trajectory: Parabolic
  • Flight region: Mostly exo-atmospheric
  • Examples: Agni-I to Agni-V, Prithvi
• Cruise Missiles
  • Trajectory: Aerodynamic, low-altitude
  • Flight region: Within atmosphere
  • Examples: BrahMos, Nirbhay, Tomahawk
• BrahMos is one of the fastest operational cruise missiles in the world
• Hypersonic glide vehicles (HGVs) blur the line between ballistic and cruise systems

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🧘 IAS Monk Whisper:

🌀 In warfare, the path matters as much as the power — trajectory decides destiny.