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

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

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Theory of Machine
A body is said to be under forced vibrations, when

No external force acts on a body, after giving it an initial displacement
There is a reduction in amplitude after every cycle of vibration
None of these
A body vibrates under the influence of external force

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