First slide

Elastic Modulie

Question

Identify the correct answer.
   When a very long rod suspended in air will break under its own weight. The maximum length of the rod will depend on
   a) Breaking stress   b) Density
   c) Cross-sectional area
   d) Acceleration due to gravity

Easy

A

a,b,c
B

a,b,d
C

b,c,d
D

a,b,c,d

Solution

$\large \sigma _{max}<\sigma _{br}$
$\large \therefore \frac {mg}{A}<\sigma _{br}$
$\large \Rightarrow \frac {(\rho AL)g}{A}<\sigma _{br}$
$\large \Rightarrow L_{max}=\frac {\sigma _{br}}{\rho Lg}$
so option (2) is right.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App