The man pulls the boy up to the tree limb C by walking backward. If he starts from rest when x_A = 0 and moves backward with constant acceleration a_A, determine the speed of the boy at the instant y_B = y_B1. Neglect the size of the limb. When x_A = 0, y_B = h so that A and B are coincident, i.e., the rope is 2h long. Given:

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a A УВІ = 0.2 m 2 S = 4 m h = 8 m