moment of inertia.

[markosheehan]

a uniform rod has length 6l and mass m. an axis is a distance l from the end perpendicular to the length of the rod . find the moment of inertia of the rod about this axis.

 

can some1 show me how to find this.

[Endy0816]

Hyperphysics has formulas if that helps any:

 

http://hyperphysics.phy-astr.gsu.edu/hbase/mi.html

 

If you could clarify your values, that would help in providing a response. We can guess, but don't want to steer you wrong.

[imatfaal]

Two hints

 

1. Always draw a diagram - this helps you make sure you have it in your head straight and even if you have it wrong it might well demonstrate to your teacher / marker that you understood the methodology but got confused in the question. Diagrams are just a must in these sorts of questions - they do not have to be to scale or works of art.

 

2. You will also need the Parallel Axis Theorem in addition to the link that Endy has provided.