Mark the correct statements for a particle going on a straight line

  • A

    if the position and velocity have opposite sign, the particle is moving towards the origin

  • B

    if the velocity is zero for a time interval, the acceleration is zero at any instant within the time interval

  • C

    if the velocity and acceleration have opposite sign, the object is slowing down

  • D

    All of the above

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  • [AIPMT 1994]