Theory of Machine
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is

Greater than 2
Equal to 1
Equal to 2
Less than 2

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Theory of Machine
The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to

Any one of these
Two lower pairs and two additional links
Two lower pairs and one additional link
One lower pair and two additional links

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