Machine Design
The anti-friction bearings

Can carry both radial and thrust loads
Have low starting and low running friction at moderate speeds
Have high initial cost
All of these

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Machine Design
The shear stress at a point in a shaft subjected to a torque is

Directly proportional to the polar moment of inertia and to the distance of the point from the axis
Directly proportional to the applied torque and the polar moment of inertia
Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia

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