DEGREE OF FREEDOM
An object in space has six degrees of freedom.
Translatory motion along X, Y, and Z axis (3 D.O.F.)
Rotary motion about X, Y, and Z axis (3 D.O.F)
 |
| Degree of freedom |
The rigid body has 6 DOF in space but due to formation of linkage one or more DOF is lost due to the presence of constraint on the body. The total number constraints cannot be zero as the body has to be fixed at some place to make the linkage possible. Thus the degree of freedom is given by
DOF= 6- (Numbers of Restraints)
 |
| Pairs having varying degree of freedom |
