Theory of Machine
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimed stroke respectively, is

Minimum and maximum
Maximum and zero
Zero and minimum
Zero and maximum

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Theory of Machine
The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

m.ω².r (cos 2θ/n)
m.ω².r cosθ
m.ω².r (sin 2θ/n)
m.ω².r sinθ

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