Velocity of an object in rectilinear motion is given as function of time by $v = t -t^3$, where $v$ is in $m/s$ and $t$ is in seconds. Its average velocity over the time interval from $t = 0\ s$ to $t = 2\ s$ is........$m/s$

  • A

    $0$

  • B

    $1$

  • C

    $2$

  • D

    determinable, if initial position is known

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