Theory of Machine
Sense of tangential acceleration of a link

Is same as that of velocity
Could be either same or opposite to velocity
Is opposite to that of velocity
Is perpendicular to that of velocity

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Theory of Machine
Angle of dwell of cam is defined as the angle

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

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