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

(2/3). μ W (r₁ + r₂)
(1/2). 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
Hammer blow

Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Varies as the square root of the speed
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses
Varies inversely with the square of the speed

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Theory of Machine
The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

90° in the direction of rotation of the link containing the path
45° in the direction opposite to the rotation of the link containing the path
45° in the direction of rotation of the link containing the path
180° in the direction opposite to the rotation of the link containing the path

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