Machine Design
The application of second type levers is found in

Hand wheel of a punching press
Lever of a loaded safety valve
A pair of tongs
Handle of a hand pump

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

Directly proportional to the applied torque and the polar moment of inertia
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 inversely proportional to the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia

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