What is the moment of inertia of a rod with a mass of 4 kg4kg and length of 18 m18m that is spinning around its center?
1 Answer
Jan 18, 2016
Inertia is the tendency of a body to stay at rest or in constant motion, this concept can be extended to rotational.
Moment of Inertia L - is a measure of an object's resistance to changes in a rotation direction. Moment of Inertia has the same relationship to angular acceleration as mass has to linear acceleration.
For a point mass the Moment of Inertia is the mass times the square of perpendicular distance to the rotation reference axis and can be expressed as
where
L = moment of inertia (kg
m = mass
r = distance of mass from the axis or rotation
