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Which of the following can be zero for a body that has moved a non-zero distance?
ADisplacement
BPath distance
CAverage speed
DElapsed time
Answer & Solution
Correct answer: A. Displacement
1. Distance traced is always non-negative and adds up along the path.
2. Speed is non-negative as it is a scalar derived from distance.
3. Displacement is the straight-line vector from start to end.
4. If the body returns to its starting point, displacement is zero even though distance is positive.
5. Hence displacement can be zero for a non-zero distance.
_Source: Selina Concise Physics ICSE Class 9, Ch 2 'Motion in One Dimension' (aplustopper.com extract)_
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