A mechanism is defined in mechanism theory as:

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Mechanical Engineering QUESTION #2491

Question 1

Any collection of rigid bodies
A kinematic chain in which at least one link has been grounded (fixed to the frame)✔️
A chain with exactly one degree of freedom
A system with more links than kinematic pairs

Correct Answer Explanation

By Reuleaux's definition, a mechanism is a kinematic chain where at least one link is grounded (fixed) to the frame.