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  9. Q4

RRB Group D (Level-1 posts) 2026 · Question 4 of 95

Which of the following conditions must be satisfied for work to be done according to science?

  1. AOnly the object moves, even if no force is applied.
  2. BThe object is at rest, and a force is applied.
  3. COnly a force is applied, even if the object does not move.
  4. DA force must act on an object, and the object must be displaced.Correct

Answer: D. A force must act on an object, and the object must be displaced.

Official answer key verified. Detailed explanation coming soon.

Source: RRB Group D 2025 question paper and answer key PDF English Feb 9 2026 Shift 2 · official-answer-key

← Q3View full paper (95 questions)Q5 →

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