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Theory of Machine

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

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

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Theory of Machine
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a

Sliding pair
Turning pair
Spherical pair
Screw pair

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is (Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)

½μWR
μwr
²/₃ μWR
¾μWR

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Theory of Machine
The Klein's diagram is useful to find

Angular acceleration of various parts
Velocity of various parts
Displacement of various parts
Acceleration of various parts

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Theory of Machine
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.

Horizontally and parallel
Vertically and perpendicular
Vertically and parallel
Horizontally and perpendicular

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Theory of Machine
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is

(kG² + h²)/h²
(kG² + h²)/h
h/(kG² + h²)
h²/(kG² + h²)

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