alleryStart learning →A body has zero average velocity over an interval. Which conclusion is FORCED?
AFinal position equals initial position
BThe body travelled zero distance
CIts average speed must also be zero
DIt must have been at rest throughout
Answer & Solution
Correct answer: A. Final position equals initial position
1. Average velocity equals total displacement divided by total time.
2. Zero average velocity means total displacement equals zero.
3. Zero displacement means the body returned to its starting position by the end.
4. The body may still have moved and even covered large distances along the way.
5. Average speed and continuous-rest claims are not implied by zero displacement.
6. So the only forced conclusion is that the final position equals the initial position.
_Source: Selina Concise Physics ICSE Class 9, Ch 2 'Motion in One Dimension' (aplustopper.com extract)_
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