Solution:
Considering x length of the rod from bottom, the FBD is as shown.
From diagram
Hence stress
Hence strain
Hence net compression is =
A thin uniform elastic rod of natural length l, area of cross-section A, density and young’s modulus Y is just completely immersed in vertical position in a liquid of density by applying a force F in vertically downward direction as shown.
What is the compression in the rod?
Considering x length of the rod from bottom, the FBD is as shown.
From diagram
Hence stress
Hence strain
Hence net compression is =