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Define following terms (i) (ii) (iii) (iv) (v) (vi) Kinematic link Kinematic pair Kinematic chain Mechanism Machine Inversion

Question: 

Define following terms
 (i)   Kinematic link 
(ii)    Kinematic pair
(iii)    Kinematic chain
(iv)    Mechanism
(v)    Machine
(vi)  Inversion

 

Answer: 

(i) Kinematic link: Each part of a machine, which moves relative to some other part, is known as a
kinematic link.
(ii) Kinematic pair: The two links or elements of a machine, when in contact with each other, are said to
form a pair. If the relative motion between them is completely or successfully constrained (i.e. in a
definite direction), the pair is known as kinematic pair.
(iii) Kinematic chain: When the kinematic pairs are coupled in such a way that the last link is joined to the
first link to transmit definite motion (i.e. completely or successfully constrained motion), it is called a
kinematic chain.
(iv) Mechanism: When one of the links of a kinematic chain is fixed, the chain is known as mechanism. It
may be used for transmitting or transforming motion e.g. engine indicators, typewriter etc.
(v) Machine: A machine is a device which receives energy and transforms it into some useful work.
(vi) Inversion: When one of links is fixed in a kinematic chain, it is called a mechanism. So we can obtain
as many mechanisms as the number of links in a kinematic chain by fixing, in turn, different links in a
kinematic chain. This method of obtaining different mechanisms by fixing different links in a kinematic
chain is known as inversion of the mechanism.

marks:

ME-6I-22655-W19-Q2-a-4-U1