Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; qa_layer_9_from_layer_php has a deprecated constructor in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 3
of /home/abouaayt/public_html/aboutcivil/answers/qa-plugin/user-management/layer.php what is the physical significance of moment of inertia? - Civil Engineering Technical Questions Answers - Ask a Civil Engineer
  • Register

Welcome to Aboutcivil Q&A, where you can ask questions related to Civil Engineering and receive answers from other members of the community.

2.5k questions

1.1k answers

44 comments

44.3k users

0 votes
what is the physical significance of moment of inertia? Please explain how it s helpful and what are the applications of moment of inertia?
in Strength of Materials by  
recategorized by

2 Answers

0 votes
Moment of inertia is the name given to rotational inertia, the rotational analog of mass for linear motion. It appears in the relationships for the dynamics of rotational motion. The moment of inertia must be specified with respect to a chosen axis of rotation. For a point mass the moment of inertia is just the mass times the square of perpendicular distance to the rotation axis, I = mr2. That point mass relationship becomes the basis for all other moments of inertia since any object can be built up from a collection of point masses.
For applications:Refer R,K,BANSAL's strength of materials.
by  
0 votes
moment of inertia has been used in civil engineering in two theories. once it has been used in bending beam theory and it has been used in buckling of beam problem. In both the cases its physical significance is different.
in bending theory, it gives the resistance of a beam to resist bending whereas in the other case, it is used to identify the buckling tendency of a beam.
by  

Related questions

0 votes
1 answer 390 views
0 votes
1 answer 222 views
222 views asked Aug 20, 2015 in Strength of Materials by mfby2k  

    Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • beam
0 votes
0 answers 142 views
142 views asked Aug 5, 2015 in Strength of Materials by mfby2k  

    Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • civil
0 votes
0 answers 449 views
449 views asked Jul 30, 2015 in Civil Engineering by mfby2k  

    Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • civil
0 votes
0 answers 927 views
927 views asked Aug 16, 2017 in Strength of Materials by shyam  

    Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • civil

  • Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • engineering

  • Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • structural

  • Warning: count(): Parameter must be an array or an object that implements Countable in /home/abouaayt/public_html/aboutcivil/answers/qa-include/qa-base.php(720) : eval()'d code on line 12
  • beam
...