The disk rotates around a fixed axis so that the dependence of the angle of rotation of the disk radius on time is given by the control f=At2 (A=0.1 rad/s2). Determine the total acceleration of a point on the disk rim at the end of the second second after the start of movement, if the linear velocity of this point at this moment is v=0.4 m/s.

A detailed solution with a brief note of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.