Moment of Inertial 慣性相關 formula Wrong

0. Moment of Inertia are used by Civil, Mechanical, and Aerospace Engineers.

1. Moment of Inertia = Angular Momentum/ Angular Velocity

= R(mv)/ (angle/time)

2. R(m) ((R) (angle/time))/ (angle/time) = m (R^2)

3. So Angular Momentum is m (R^2) Note: Moment of Inertial formulas Wrong

4. 1/2 mR^2 is derived from 1/2 mv^2 a wrong way to derive.

5. While R might vary at different point of the object, when its shape has curvature.