Theory of Machine
Two systems shall be dynamically equivalent when

All of these
The mass of two are same
G. of two coincides
M.I. of two about an axis through e.g. is equal

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Theory of Machine
Hammer blow

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

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