Theory of Machine
The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is

At 45° to PO
None of the listed here
Along PO
Perpendicular to PO

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Theory of Machine
Oldham's coupling is the

Third inversion of double slider crank chain
Third inversion of slider crank chain
Second inversion of single slider crank chain
Second inversion of double slider crank chain

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Theory of Machine
Cam angle is defined as the angle

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
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

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