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A particle starts from rest and moves in a straight line such that its velocity,...

Further Mathematics
WAEC 2011

A particle starts from rest and moves in a straight line such that its velocity, v, at time t seconds is given by \(v = (3t^{2} - 2t) ms^{-1}\). Calculate the distance covered in the first 2 seconds.

  • A. 2m
  • B. 4m
  • C. 6m
  • D. 8m
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Correct Answer: Option B
Explanation

\(v(t) = (3t^{2} - 2t) ms^{-1}\)

\(s(t) = \int v(t) \mathrm {d} t\)

= \(\int (3t^{2} - 2t) \mathrm {d} t = t^{3} - t^{2}\)

\(s(2) = 2^{3} - 2^{2} = 8 - 4 = 4m\)


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