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The collar slides to the left as the interconnected bars swing in the vertical plane. The position of the collar is x = 20 sin (50t) mm, and the angles are θ_{1} = 0.2π cos (50t), θ_{2} = 0.2π sin (50t − π/3) rad. Determine the velocity of the lower end by differentiating its position in terms of horizontal and vertical components.
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