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Which one of the following statements is not correct?

General Ability 2015 NDA General Ability 2015 NDA 2015

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

If the velocity is zero at an instant, the acceleration should also be zero at that instant

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

If the position and velocity have opposite sign, the object is moving towards the origin