75. The radius vector of a material point changes with

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Description 75. The radius vector of a material point changes with

75. The radius vector of a material point changes with time according to the law r = At2i + Btj, where A = 0,4 m / s2, B = 0,1 m / s; i and j - unit vectors of the coordinate axes x and y. Determine the expression for υ (t) and a (t); Modules speed and acceleration, tangential and normal components of acceleration at time t = 2 s.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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