What is rotational inertia or moment of inertia? What is its equivalent in linear quantities? I know what rotational inertia is; I just can't think of the equivalent in linear quantities please help.
Asked
Active
Viewed 159 times
0
-
Could you clarify your question. Your first sentence asks what rotational inertia is, yet your 3rd sentence says you know what rotational inertia is. – PM. May 30 '17 at 15:20
-
I know what it is but I can't figure out what the same thing is for linear quantities. If that makes sense. I only know the first part of the question. – tortugaaaaaaaa May 30 '17 at 15:21
-
1You might want to consider linear momentum vs. angular momentum. As presently framed it isn't really a Question that can be answered by reasoned mathematical arguments, so I'm voting to close as off-topic. – hardmath May 30 '17 at 20:53
1 Answers
1
The linear equivalent is the mass $m$
e.g. compare kinetic energy for rotation and translation $$ \frac{1}{2} I \omega^2 $$ and $$ \frac{1}{2} m v^2 $$
PM.
- 5,249