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The retardation of a particle moving in ...

The retardation of a particle moving in a straight line is proportional to its displacement proportionallity constant being unity. Find the total distance convered by the particle till it comes to rest. Given that velocity of particle is `v_(0)` at zero displacement.

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The correct Answer is:
D

Here average acceleration `=(16-0)/(4-1)=(48-16)/(12-4)=(88-48)/(22-12)=4`
But we can't certainly that body have uniform acceleration.
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