A particle of mass $m$ is at rest at the origin at time $t = 0$. It is subjected to a force $F(t) = F_0e^{-bt}$ in the $x$ direction. Its speed $v (t)$ is depicted by which of the following curves?

  • [AIEEE 2012]
  • A
    22-a300
  • B
    22-b300
  • C
    22-c300
  • D
    22-d300

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