The sailboat moves straight at a speed of 18 km / h. Suddenly, a complete calm sets in and the acceleration of the boat begins to change according to the law a = - aV0i / (t + a) ^ 2 (m / s ^ 2), where a = 1 c (the x axis is directed along the initial velocity vector). Find the path of a point as a function of time. Which way will the point pass before stopping?

A detailed solution with a brief description of the condition, formulas and laws used in the solution, the derivation of the formula and the answer.
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