Theory of Machine
Two systems shall be dynamically equivalent when

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

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Theory of Machine
Cam angle is defined as the angle

Through which, the cam rotates during the period in which the follower remains in the highest position
Of rotation of the cam for a definite displacement of the follower
During which the follower returns to its initial position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

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