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Topic

Work-energy

Asked 2 times across 2 UPSC exams over 2 years (2021–2023), peaking in 2021.
2
PYQs
2
Exams
2
Years active
2021–2023
Span
2021
Peak
2/2
Answers
📅 Full chronological timeline →

Key insights

  • Most tested in NDA — 1 of 2 PYQs
  • Most asked in 2021
  • Recurs across 2 years (2021–2023)

How it travelled across exams

First appearance in each exam — the same idea, reframed.
NDA 2021 GEO 2023

How the concept evolved

121
123
Rising — more than half its appearances (2 of 2) are since 2016.

Sample questions

You've seen the pattern — here are a few of the actual PYQs.
GEO2023
In which of the following situations will an applied force do negative work on a body?
  1. A The applied force and displacement of the body are at 135° to each other ✓
  2. B The applied force and displacement of the body are parallel to each other
  3. C The applied force and displacement of the body are perpendicular to each other
  4. D The applied force and displacement of the body are at 45° to each other
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
NDA2021
A negative work is done when an applied force F and the corresponding displacement S are
  1. A perpendicular to each other.
  2. B parallel to each other.
  3. C anti-parallel to each other. ✓
  4. D equal in magnitude.
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry

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