The position `x` of a particle with respect to time `t` along the x-axis is given by `x=9t^(2)-t^(3)` where `x` is in meter and `t` in second. What will be the position of this particle when it achieves maximum speed along the positive `x` direction

Answer

A

Explanation

In air, the relative acceleration is zero. The relative velocity becomes constant which increases distance linearly which time.