14.2.8. Material point of mass m = 0,5 kg moves according to the vector equation r = 2sinπti + 3cosπtj. Determine the amount of projection of the point on the x-axis at time t = 0,5 s.

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(Chapter 3 - Dynamics theme - 14.2: Number of motion pulse power.) From Reshebnik to the collection of short theoretical mechanics Kep tasks OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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