Mechanism, Machine and Theory of Machines
Mechanism:
If a number of bodies / parts
are assembled in such a way that the motion of one body / part causes
constrained and predictable motion of other bodies / parts is called a
Mechanism. So a mechanism transmits and modifies motion.
Machine:
A machine is a mechanism or a combination of mechanisms, apart from imparting definite motion to the bodies / parts also transmits and modifies the available mechanical energy into desired work.
Theory of Machines:
The subject comprises study of kinematics and dynamics of machines is called Theory of Machines.
The study of relationship between the
geometry of machine parts and their relative motion is called Kinematics.
The study of forces, which produce the
relative motion between the parts is called Dynamics.
Dynamics further be divided into Statics
and Kinetics. Statics deals with the forces that act on the machine parts which
are assumed to be mass-less. Where as Kinetics deals with the inertia forces
arising out of the combined effect of mass and motion of the parts.
