center of gravity


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center of gravity:

see center of masscenter of mass,
the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of the sphere.
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Center of gravity

A fixed point in a material body through which the resultant force of gravitational attraction acts. The resultant of all forces or attractions produced by the Earth's gravity on a body constitutes its weight. This weight is considered to be concentrated at the center of gravity in mechanical studies of a rigid body. The location of the center of gravity for a body remains fixed in relation to the body regardless of the orientation of the body. If supported at its center of gravity, a body would remain balanced in its initial position. See Gravity, Resultant of forces

center of gravity

The point in a material body at which a single force, which is the resultant of all external forces on the body, may be considered to act. The center of gravity of a body in a uniform gravitational field coincides with the body's center of mass. A body does not possess a center of gravity, however, if the external forces are not equivalent to a single resultant force or if the resultant does not always act on the same point of the system. This situation occurs in a nonuniform gravitational field. The Moon has strictly no center of gravity although the resultant force of the Earth's gravitational attraction always passes within a few meters of the center of mass.

Center of Gravity

 

the geometric point through which the resultant of all gravitational forces acting on the particles of a body passes. The location of a body’s center of gravity is fixed relative to the body regardless of the body’s position in space.

It is possible for a body’s center of gravity not to coincide with any of the points of the body; a ring is an example of such a body. If a free body is suspended by a thread attached successively to different points of the body, the various directions of the thread will intersect at the body’s center of gravity. In a uniform gravitational field a body’s center of gravity coincides with its center of mass.

Suppose a body is divided into parts. If the weight pk of each part and the coordinates xk, yk, zk of each part’s center of gravity are known, then the coordinates of the center of gravity of the body as a whole can be found from the equations

In the case of a homogeneous body that has a center of symmetry—for example, a sphere, a cylinder, or a rectangular or round plate—the center of gravity is located at the center of symmetry.

center of gravity

[′sen·tər əv ′grav·əd·ē]
(mechanics)
A fixed point in a material body through which the resultant force of gravitational attraction acts.

center of gravity, center of mass

A point within a body such that, if the whole mass of the body were concentrated there, the attraction of gravity would remain the same.
References in periodicals archive ?
Gravity behaves as if all the weight of an object is concentrated in a single point, its center of gravity. In spherical objects, this center of gravity is the sphere's geometric center.
This simple logic brings us to an analogy that enables us to grasp the idea more clearly, namely, the nature and effect of a center of gravity in the mechanical sciences."
invasion of the island of Okinawa) that are relevant for center of gravity analysis.
Joint doctrine defines a center of gravity as "the source of power that provides moral or physical strength, freedom of action, or will to act." (9) The Marine Corps further describes an operational-level center of gravity as "normally an element of the enemy's armed forces" that is the "most dangerous to us or the one that stands between us and the accomplishment of our strategic mission." (10) These definitions provide the doctrinal baseline for threat analysis, but may not fully apply to hybrid threats.
* When you carry an object, it shifts the location of your center of gravity. For instance, if you carry an object in front of you, your center of gravity moves forward.
Many solid-modeling CAD software programs can accurately specify the location of a mold's center of gravity with just a couple of mouse clicks.
Concentrating on the plug mode based on various missions for fighters with much heavy fuel load or quite a few weapons, a method based on RSA is designed and used to solve the optimization plug mode for minimum changing aircraft center of gravity.
The term center of gravity entered Australian Army doctrine in 1992 and ADF joint doctrine in 1998.
The new center of gravity is in the stack of pennies.
The idea that the army is the center of gravity in Pakistan, which has been propagated by the vast propaganda network sponsored by the defense Establishment, is incorrect and obscene.
That let him control his center of gravity, the point around which his weight was evenly distributed.

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