Solution of task 7.4.4 from the collection of Kepe OE

Solution of task 7.4.4 from the collection of Kepe OE

7.4.4
Determine the acceleration of point H at the time when the angle? = 60 °, if the length OA = AB = 20 cm, and the law of change of the angle? = 3t. (Answer -1.8)

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