An iron bar of length \(l\) cm and cross section A cm2 is pulled by a force of F dynes from ends so as to produce an elongation \(\Delta l\) cm. Which of the following statement is correct ?
Practice this Elasticity question from Engineering Entrance Exam.
Question Details
Physics
Elasticity
Engineering Entrance Exam
Question
An iron bar of length \(l\) cm and cross section A cm2 is pulled by a force of F dynes from ends so as to produce an elongation \(\Delta l\) cm. Which of the following statement is correct ?
Solution
According to Hooke’s law
\(\frac{F}{A} \propto \frac{{\Delta l}}{l}\)
\( \Rightarrow \) For same \(F\) & \(l\), \(\Delta l \propto \frac{1}{A}\)