The material point mass m = 15 kg moving from rest on a smooth guide radius R, arranged in a horizontal plane under the force F = 0,5t. Determine at time point t = rate of 30 if the force forms a constant angle of 50 ° with the velocity vector.

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(Chapter 3 - Dynamics theme - 13.1: Defining the parameters of curvilinear motion by the given forces) from the collection of short tasks on the theoretical mechanics Kep OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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