state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Mechanical Properties of Solids Hooke’s law
A uniform rod of mass m, length L, area of cross-section A and young’s modulus Y hangs from the ceiling. Its elongation under its own weight will be
1
zero
2
\(\frac{m g L}{2 A Y}\)
3
\(\frac{m g L}{A Y}\)
4
\(\frac{2 m g L}{A Y}\)