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###### Engineering · Mechanical Engineering
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Q-9     The figure below shows a four-bar with the following dimensions: O2O4 = a1 = 100 mm, O2A = a2 = 150 mm, AB = a3 = 250 mm, O4B = a4 = 250 mm, AC = b1 = 300 mm, BC = b2 = 150 mm. The input rotational velocity is to be taken as ω12 = 4 rad/s (c.c.w.). 1. Choose an appropriate velocity scale, kv, and using relative velocity and velocity vector polygon methods, determine the magnitude and direction of the velocities VA, VB, VC and VB/A in mm/s.                                                                                                         [20 pts.]
2. Determine the magnitude and direction of the velocities ω13 and ω14 in rad/s.   [12 pts]
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