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Theory of Machine

Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Are in phase
Leads by 180°
Lags by 90°
Leads by 90°

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Theory of Machine
Coriolis component acts

Perpendicular to sliding surfaces
None of these
Along sliding surfaces
Somewhere in between above two

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Theory of Machine
In a simple harmonic motion, the velocity vector with respect to displacement vector

Leads by 90°
Is in phase
Leads by 180°
Lags by 90°

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Theory of Machine
A universal joint is an example of

Sliding pair
Lower pair
Rolling pair
Higher pair

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Theory of Machine
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r + R) sinφ]/2
[(r² + R²) sinφ]/2
[(r + R) cosφ]/2
[(r² + R²) cosφ]/2

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

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

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