Lag1989 task №1.26

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The speed of the material point, moving in the xy plane, varies with time according to the law v = Ai-2Bj, where A and B - are positive constants. Find: a) The time dependence of the velocity of the point of the module; b) the acceleration of the points and the module; c) the dependence of the radius vector r of the point of time, if at the time t = 0, it was zero.
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