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Mechanical Engineering QUESTION #2484
Question 1
A 'dyad' in Assur group theory is a system group consisting of:
  • One link and one kinematic pair
  • Two links and two full kinematic pairs
  • Two links and three full kinematic pairs (zero DOF group)✔️
  • Three links and four kinematic pairs
Correct Answer Explanation
An Assur dyad is the simplest system group (zero-DOF group): 2 links (\(n=2\)) and 3 full (5th-class) kinematic pairs (\(c_5=3\)), satisfying \(3n-2c_5=3(2)-2(3)=0\).