Theory of Machine
The example of successfully constrained motion is a

Motion of an I.C. engine valve
Piston reciprocating inside an engine cylinder
All of these
Motion of the shaft between a footstep bearing

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Theory of Machine
Hammer blow

Varies inversely with the square of the speed
Varies as the square root 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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Theory of Machine
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

Radius of circular arc, cam speed, location of centre of circular arc and roller diameter
Mass of cam follower linkage, spring stiffness and cam speed
Total lift, total angle of lift, minimum radius of cam and cam speed
Total lift, centre of gravity of the cam and cam speed

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