defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Mechanical Properties of Solids Hooke’s law
What is the force required to increase the length of a wire by x, if initial length of the wire is L, cross-sectional area is A, and young modulus is Y.
1
\(F= \frac{YL}{xA}\)
2
\(F= \frac{YAL}{x}\)
3
\(F= \frac{YAx^2}{L^2}\)
4
\(F= \frac{YAx}{L}\)