Equations
Moment of inertia of a point mass
Dynamics · id moment_of_inertia_point
I = m r^2
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
I | moment of inertia | kg*m^2 | Rotational inertia about the axis | 1e-06 to 1e+09 |
m | mass | kg | Mass of the particle | 0.001 to 1e+07 |
r | radius | m | Distance from the axis | 0 to 1000 |
Assumptions
- Point mass (size small compared with r)
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: moment of inertia, rotational inertia, point mass, rotation, radius.
Source
OpenStax University Physics Volume 1, Chapter 10 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.