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Solution


Q.

Let a wire be suspended from the ceiling (rigid support) and stretched by a weight W attached at its free end. The longitudinal stress at any point of cross-sectional area A of the wire is               [2023]
 
1 W/2A  
2 Zero  
3 2W/A   
4 W/A   

Ans.

(4)

Longitudinal stress is the normal stress which changes the length of the body, it is given by =WA