The rectangular beam 'A ' has length l, width b and depth d. Another beam 'B' has the same width and depth but length is double that of 'A'. The elastic strength of beam 'B' will be __________ as compared to beam A.
A. Same
B. One-half
C. One-fourth
D. One-eighth
Answer: Option B
This Question Belongs to Mechanical Engineering >> Strength Of Materials In ME
Section modulus is also known as elastic strength
Z= I/y
If y=doubled
Z will be half
Please give the explanation