Theory of Machine
A body in motion will be subjected to Coriolis acceleration when that body is

In plane translation with variable velocity
In plane rotation with variable velocity
Restrained to rotate while sliding over another body
In plane motion which is a resultant of plane translation and rotation

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Theory of Machine
The velocity of piston in a reciprocating steam engine is given by (where ω = Angular velocity of crank, r = Radius of crank pin circle, θ = Angle turned by crank from inner dead center, and n = Ratio of length of connecting rod to the radius of crank)

ωr [cos θ + (cos 2θ/n)]
ω²r [cos θ + (cos 2θ/n)]
ω²r [sin θ + (sin 2θ/n)]
ωr [sin θ + (sin 2θ/n)]

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