Question

For a kinematic chain to be considered as mechanism

(a) two links should be fixed

(b) one link should be fixed

(c) none of the links should be fixed

(d) there is no such criterion

I have been asked this question in an online interview.

This interesting question is from Grubler’s Criterion for Plane Mechanisms in division Simple Mechanisms of Machine Kinematics

Answer 1

Correct option is (b) one link should be fixed

Easiest explanation: If one of the links of the constrained chain is fixed, it results into mechanism.