Theory of Machine
Which of the following governor is used to drive a gramophone?

Porter governor
Watt governor
Hartnell governor
Pickering governor

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Theory of Machine
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively)

(1/2) μ W (r₁ + r₂)
(2/3) μ W (r₁ + r₂)
(1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]
(2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]

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Theory of Machine
The direction of Coriolis component of acceleration is the direction

Along the centripetal acceleration
Along perpendicular to angular velocity
Along tangential acceleration
Of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link

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