Measurement relating to how long it takes the axis of rotation to stabilize (stop changing positions).

The rotational analogue of mass, a measure of the difficulty in rotationally accelerating a body.

A rigid bodyâ€(tm)s resistance to being rotated. The moment of inertia for a single particle is MR 2, where is the mass of the rigid body and is the distance to the rotation axis. For rigid bodies, calculating the moment of inertia is more complicated, but it generally takes the form of a constant multiplied by MR

The moment of inertia with respect to a given axis is the limit of the sum of the products of each of the elemental particles in which the body may be conceived to be divided and the square of their distance from the given axis. Print this section of the EDM Glossary«« Return to Main Glossary Page N - There are no Terms for this section«« Return to Main Glossary Page O - There are no Terms for this section«« Return to Main Glossary Page

This, by definition, is the resistance to rotating motion. Mathematically, it is equal to the mass times the distance squared. The further the mass is away from the rotation point the harder it is to rotate (or to slow down). It is interchangeable with radius of gyration as far as the effect to the ball reaction. :: Poll :: What is your average? 120 or Below 121-160 161-180 181-200 201-220 221+ View Votes Hits

The resistance to twisting of any golf club head when that head is impacted off-center.

The rotational analog of mass. The sum of the products of mass and the square of the perpendicular distance to the axis of rotation of each particle in a body rotating about an axis. Moments of Inertia, Properties of Sections

The resistance of an object to turning about an axis of rotation.

the tendency of a body to resist angular acceleration

the rotational analogue of mass, in units of mass*length2 (see rotational kinematics)

the mass of a rotating object times the square of the distance to the axis of rotation

Represented by the equation, I = Apt = Zr2dA, where is the area of the section considered, p the radius of gyration, and the distance of any point from an assumed line lying either in the surface or outside of it: in other words, the moment of inertia of a surface about any axis is the product of the area by the square of the radius of gyration; or it is the summation of the products of each differential of the area by the square of its distance from the axis. If the axis lie in the surface, the moment of inertia is called a surface moment of inertia; while, if the axis be perpendicular to the surface, the moment of inertia is called a polar moment of inertia.

Moment of inertia has two distinct but related meanings: 1) it is a property of a an object relating to the magnitude of the moment required to rotate the object and overcome its inertia. 2) A property of a two dimensional cross section shape with respect to an axis, usually an axis through the centroid of the shape.

Referring to rotation about an axis. In the pump business it refers to a formula that describes the shape of the shaft. A solid shaft would have a different moment of inertia than a hollow shaft.

the amount of twisting in the clubhead at impact; the higher the moment of inertia, the lower the amount of twisting; manufacturers claiming to have a larger sweet spot actually have improved the moment of inertia rather than the sweet spot.

the golf club feature that promotes a resistance to twisting. More MOI the more resistance to twisting.

a measure of a clubs resistance to twisting or the stability of the club head. The higher the MOI of the club is, the less the club will twist at impact.

Measurement of the resistance to twisting.

The tendency of an object to resist changes in its angular velocity.

This is similar to inertia except that it relates to rotating movement rather than linear movement. Linear movement is the tendency of an object to remain motionless if at rest and to keep moving in a straight line if already in motion. The moment of inertia, however, is the tendency of an object to resist being accelerated when it is rotating. The polar moment of inertia is the rotating movement around a vertical axis through the center of rotation. It greatly affects steering and handling response in an automobile. The greater the length of the axis the greater the polar moment of inertia. By having the heavy components of a vehicle such as the engine and transmission between the two front wheels, the polar moment of inertia is low so that the tires can easily change the direction of the vehicle.

Amount of force required to spin an object. Mathematically, it is equal to the mass times the distance squared. The further the mass is away from the rotation point the harder it is to rotate (or to slow down for that matter). It is interchangeable with radius of gyration as far as the effect to the ball reaction.

The second moment of area of a section about the elastic neutral axis.