Resolution and Composition Method
A crank Q2B, 9 in. long, rotates clockwise at 75 rpm and is connected to the midpoint of a link CD 24 in. long. Point C is pinned to a crank Q4C, 42 in. long, whose fixed center Q4 is 40 1/2 in. to the right and 15 in. above point Q2. Point D is connected by means of a connecting rod DF, 48 in. long, to a slide 8 at pin F, whose path is a horizontal line 9 in. below Q2 and to the right of D. Link BH, 12 in. long, is pinned to CD at B and link GH, also 12 in. long, is pinned to link Q4C at G which is 12 in. to the right of C. Fixed to link GH at G and extending upward and at a right angle to GH is a rod GK, 8 in. long.
Find the velocities in feet per second by the resolution and composition method of points B, G, H, K, F and midpoint of link DF for
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