Question

The following figure shows a rock crushing mechanism. Determine the angular displacement of the crushing ram if the crank is rotated clockwise by 25° from the starting position (shown in the figure). Write your result in degrees and in absolute value360 mm Crushing ram Crank T 60 mm 75° 180 mm 420 mm

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360 750 420Solution: In AABC Using cosine law, Ac?º= BC?+ AB2-2 (8C)CAB) cos (105) = 60? + 3602-2660)(360) cos (105) = 144380.98 CHA .:

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