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Question

An object, moving with a speed of 6.25 m/s, is decelerated at a rate given by:
dvdt=2.5v where v is the instantaneous speed. The time taken by the object, to come to rest, would be:
  1. 2 s
  2. 4 s
  3. 1 s
  4. 8 s

A
4 s
B
2 s
C
8 s
D
1 s
Solution
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Accordingtoquestion...................06.25(dvv)=2.5t0dt2v06.25=2.5t2.6.25=2.5tt=2ssothecorrectoptuonisA

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