Q:
What are the units for moment of inertia?
A:
Quick Answer
The SI units for moment of inertia are kg m^2. For a point mass, the moment of inertia equals mass times radius squared, so other mass units (such as pounds) and other distance units (such as feet) are occasionally used instead.
Continue ReadingFull Answer
A specific axis of rotation must be defined to calculate the moment of inertia since it measures an object's resistance to a change in rotational direction. Multiple point masses or continuous objects have a moment of inertia that is the sum of all the point masses within the object. For continuous objects this is found by integration. There are known formulas to calculate the moment of inertia for common shapes like cylinders or rods.
Learn more about Motion & MechanicsSources:
Related Questions
-
Q:
Why does a ring have a higher moment of inertia than a solid disc of equal mass and outer radius?
A: Northwestern University explains that a ring has a higher moment of inertia than a solid disk of equal mass and outer radius because it has less mass at it... Full Answer >Filed Under: -
Q:
What is the parallel axis theorem?
A: The parallel axis theorem states that the "moment of inertia of any object about an axis through its center of mass is the minimum moment of inertia for an... Full Answer >Filed Under: -
Q:
How do you calculate the moment of inertia of a rod?
A: Calculating the moment of inertia for a rod requires you to know the mass, length and location of the rotational axis. An estimation may be required with r... Full Answer >Filed Under: -
Q:
What is resistance to change in motion?
A: Resistance to change in motion is called inertia. The amount of inertia in an object is directly proportional to its mass; an object with greater mass has ... Full Answer >Filed Under:
