Correct Answer - Option 3 : 3
Concept:
Degree of Freedom: The degree of freedom (DOF) of a mechanical system is the number of independent variables required to define the position or motion of the system.
For a simple mechanism, the degree of freedom (F) is given by the Grubler’s criterion:
F = 3 (n - 1) - 2j - h
Where j = number of revolute joints
n = number of links
h = number of higher pairs
Calculation:
Given, n = 8, j = 9, h = 0
F = 3 (8 - 1) - 2 × 9 - 0
F = 21 - 18 = 3
