D 1200 N 100 mm 700 mm M 400 mm
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The Whitworth mechanism shown is used to produce a quick-return motion of point D. The block at B is pinned to the crank AB and is free to slide in a slot cut in member CD . Determine the couple M that must be applied to the crank AB to hold the mechanism in equilibrium when (a) a= 0, (b)a =30°.
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