mechanisms and machines | Theory of machine


it deals with the relative motions of different parts of a mechanism without taking into consideration the force producing the motions. thus, it is the study, from a geometry point of view to know the displacement velocity and acceleration of a part of a mechanism.


it involves the calculations of forces impressed upon different parts of a mechanism. the force can be either static or dynamic. dynamic is further subdivided into kinetic and statics. kinematics is the study of force when the body is in motion whereas statics deals with forces when the body is stationary.

 mechanism and machine

as mentioned earlier a combination of a number of bodies (usually rigid) assembled in such a way that the motion of one causes constrained and predictable motion to the other is known as a MECHANISM. thus, the function of a mechanism is to transmit and modify a motion.

a machine is a mechanism or a combination of mechanisms which apart from imparting definite motion to the parts also transmits and modifies the available mechanical energy into some kind of desired work. it is neither a source of energy nor a producer of work but helps in the proper utilization of the same. the motive power has to be delivered from external sources.

type of constrained motion

there are three types of constrained motion:-

completed constrained motion


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