Theory of Machine
If the damping factor for a vibrating system is unity, then the system will be

Without vibrations
Critically damped
Over damped
Under damped

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Theory of Machine
Hammer blow

Varies as the square root of the speed
Varies inversely with the square of the speed
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses
Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.

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