Register to reply

Moments of inertia

by darksyesider
Tags: inertia, inertias, moment, moments
Share this thread:
darksyesider
#1
Jan13-14, 04:29 PM
P: 55
Hi all, I was just wondering:

suppose you have a setup of a torsion pendulum.
You have a disk and ring attached, and you want to calculate the moment of inertia of the system.

Do you just add the separate moment of inertia's of it?

Like it would be: 1/2 mR^2 + 1/2M_2 (R_1^2+R_2)^2 = I_net ??

My friend was discussing this with me today, and he got something different, and I am confused on it.

EDIT: actually i just found out how to do this. Please disregard (could a moderator please delete this post; i can't find the delete button)
Phys.Org News Partner Physics news on Phys.org
A new, tunable device for spintronics
Watching the structure of glass under pressure
New imaging technique shows how cocaine shuts down blood flow in mouse brains
Simon Bridge
#2
Jan13-14, 06:34 PM
Homework
Sci Advisor
HW Helper
Thanks
Simon Bridge's Avatar
P: 12,873
Do you just add the separate moment of inertia's of it?
Yes.

Like it would be: 1/2 mR^2 + 1/2M_2 (R_1^2+R_2)^2 = I_net ??
Depends on the geomatry.

EDIT: actually i just found out how to do this. Please disregard (could a moderator please delete this post; i can't find the delete button)
... try the "report" button.
OR you could try answering your own question and leaving it here - that way your efforts help others who google the same question.


Register to reply

Related Discussions
Inertia - Moments of Inertia of a rigid body (different axes) Introductory Physics Homework 6
Moments of Inertia Introductory Physics Homework 0
Moments of Inertia Introductory Physics Homework 11
Moments of inertia Introductory Physics Homework 6
Moments of inertia Advanced Physics Homework 3