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1.7 A knuckle-joint mechanism of a press is shown in Figure 1.14. The crank OA rotates uniformly at 90 r/min anti-clockwise. In the given position the crank OA has an angle of 30° to the horizontal. Use a scale of 10 mm = 100 mm for the configuration diagram. 1.7.1 Use a scale of 10 mm = 0,2 m/s to draw the velocity diagram, and determine the magnitude and direction of the velocity of D. (0.9 m/s) 1.7.2 Use a scale of 10 mm = 1 m/s² to draw the acceleration diagram, and determine the acceleration (or deceleration) of D. (3.5 m/s²) OA = 120 mm AC = BC = CD = 450 mm

          1.7
A knuckle-joint mechanism of a press is shown in Figure 1.14. The crank OA
rotates uniformly at 90 r/min anti-clockwise. In the given position the crank OA
has an angle of 30° to the horizontal. Use a scale of 10 mm = 100 mm for the
configuration diagram.
1.7.1 Use a scale of 10 mm = 0,2 m/s to draw the velocity diagram, and determine
the magnitude and direction of the velocity of D. (0.9 m/s)
1.7.2 Use a scale of 10 mm = 1 m/s² to draw the acceleration diagram, and
determine the acceleration (or deceleration) of D. (3.5 m/s²)
OA = 120 mm
AC = BC = CD = 450 mm

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1.7
A knuckle-joint mechanism of a press is shown in Figure 1.14. The crank OA
rotates uniformly at 90 r/min anti-clockwise. In the given position the crank OA
has an angle of 30° to the horizontal. Use a scale of 10 mm = 100 mm for the
configuration diagram.
1.7.1 Use a scale of 10 mm = 0,2 m/s to draw the velocity diagram, and determine
the magnitude and direction of the velocity of D. (0.9 m/s)
1.7.2 Use a scale of 10 mm = 1 m/s² to draw the acceleration diagram, and
determine the acceleration (or deceleration) of D. (3.5 m/s²)
OA = 120 mm
AC = BC = CD = 450 mm

Added by James W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

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Solved by Expert Emily Anderson

Step 1

1. **Scale Conversion**: Use a scale of 10 mm = 100 mm. 1.2. **Draw Crank OA**: - Length of OA = 120 mm. - Angle of OA with the horizontal = 30°. - Using the scale, OA = 12 mm. - Draw OA at 30° to the horizontal. 1.3. **Draw Link AC**: - Length of Show more…

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1.7 A knuckle-joint mechanism of a press is shown in Fiqure 1.14.The crank OA rotates uniformly at 90 r/min anti-clockwise. In the given position the crank OA has an angle of 30 to the horizontal. Use a scale of 10 mm =100 mm for the configuration diagram. 1.7.1 Use a scale of 10 mm =0,2 m/s to draw the velocity diagram, and determine the magnitude and direction of the velocity of D.0.9 m/s 1.7.2 Use a scale of 10 mm =1 m/s to draw the acceleration diagram, and determine the acceleration (or deceleration of D.3.5 m/s OA=120mm AC =BC =CD=450 mm 445 mm 575 mm Figure 1.14

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