# Find the inclination of the slotted bar with the vertical in degrees in the extreme position from the following information: In a crank and slotted lever quick return motion mechanism, the distance between the fixed centres is 0.240 m and the length of the driving crank is 0.120 m.

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Find the inclination of the slotted bar with the vertical in degrees in the extreme position from the following information: In a crank and slotted lever quick return motion mechanism, the distance between the fixed centres is 0.240 m and the length of the driving crank is 0.120 m.

(a) 30

(b) 45

(c) 60

(d) 75

The question was posed to me during an interview.

Query is from Single Slider Crank Chain and its Inversions topic in division Simple Mechanisms of Machine Kinematics

by (106k points)
Right choice is (a) 30

To elaborate: In a crank and slotted lever mechanism, symmetry can be observed. Using this symmetry and trigonometric ratios we find that

angle = 30 degrees.

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