In a four bar chain mechanism, there are 4 links and 4 turning pa

In a four bar chain mechanism, there are 4 links and 4 turning pa
| In a four bar chain mechanism, there are 4 links and 4 turning pairs. If one of the link is fixed, the degree of freedom of mechanism is 

A. 1

B. 2

C. 3

D. 6

Please scroll down to see the correct answer and solution guide.

Right Answer is: A

SOLUTION

Concept:

Gruebler's criteria for planar mechanism:

DOF = 3(n - 1) - 2P

where n = no of links, P = No of lower pairs(turning pairs)

Calculation:

Given:

n = 4, P =4

DOF = 3(4 - 1) - 2 × 4 = 1

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