(Question: 3) The disk-three link system shown in the figure has the links, 1-2, 2-3, 3-4 and the disk. Compute the velocity and the acceleration of the link 1-2, which moves forth and back, and the angular velocity, đa and the angular acceleration, đa of the disk with the radius R = 4.5 (m) at the instant shown, 0 = 60 (deg) and when the joint 2 is subjected to the angular velocity, d= - V3 (rad/s) and the angular acceleration, a = 20 v3 (rad/ s²),L2-3 = L3-4 = 3 (m) are the length of each link. We assume that there is no sliding between the link 1-2 and the disk contour in surface contact and the link 1-2 makes the disk rotate.

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Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing.