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4. In cam mechanisms, (20%) (a) What is the advantage of roller follower comparing to knife-edge and flat-face followers? (b) Why is infinite acceleration or

image text in transcribed 4. In cam mechanisms, (20%) (a) What is the advantage of roller follower comparing to knife-edge and flat-face followers? (b) Why is infinite acceleration or jerk not good for follower motion? (c) What are the characteristics of uniform motion and harmonic motion on acceleration and jerk? (d) Why the pressure angle should be small? (e) List three methods to reduce the pressure angle

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