Q.
A uniform slender rod of length L, cross-sectional area A and Young’s modulus Y is acted upon by the forces shown in the figure. The elongation of the rod is
A) $\frac{3FL}{5\ AY}$
B) $\frac{2FL}{5\ AY}$
C) $\frac{3FL}{8AY}$
D) $\frac{8FL}{3AY}$
Explanation
(d) Net elongation of the rod is
[image:9_image20.emf]
$l = \ \frac{3F\left( \frac{2L}{3} \right)}{AY} + \frac{2F\left( \frac{L}{3} \right)}{AY}$
$l = \frac{8FL}{3AY}\ $
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.