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


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



(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.