Solution of task 9.7.17 from the collection of Kepe OE

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9.7.17
In the position of the articulated quadriline shown in the figure, the velocity and acceleration of the point A of the crank OA are equal to: vA = 2 m / s, aA = 20 m / s2.
Determine the acceleration of the point B of the connecting rod AB, if the lengths AB = BC = 0.8 m (Answer 25)