Solution 14.2.8 collection of Kep OE 1989

Solution 14.2.8 collection of Kep OE 1989

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.

Additional information:

Right after the payment you will receive a link to a zip archive with the solution of the problem 14.2.8
(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.
Task completed in word format (manuscript).
After checking the solutions I would be very grateful if you leave a positive review.