Theory of Machine
The Klein's diagram is useful to find

Displacement of various parts
Acceleration of various parts
Velocity of various parts
Angular acceleration of various parts

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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
A body vibrates under the influence of external force
There is a reduction in amplitude after every cycle of vibration
None of these

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