What condition is necessary for an object's displacement to be zero?

Question

What condition is necessary for an object's displacement to be zero? — Exam MCQ

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A. Its initial and final positions are the same. — Displacement is final position minus initial position and is zero when these positions coincide.

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B. Its distance travelled equals its displacement.

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C. Its distance travelled is less than its displacement.

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D. Its distance travelled is greater than its displacement.