# Moment (physics)

**momentmomentsmoment armrotational momentrighting momentbending momentload momentmoment of forcemoment''.moments of force**

In physics, a moment is an expression involving the product of a distance and another physical quantity, and in this way it accounts for how the physical quantity is located or arranged.wikipedia

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### Torque

**moment armmomentlever arm**

For example, the moment of force acting on an object, often called torque, is the product of the force and the distance to the object from the reference point.

When being referred to as moment of force, it is commonly denoted by M.

### Angular momentum

**conservation of angular momentumangular momentamomentum**

It has the effect of multiplying the momentum's effort in proportion to its length, an effect known as a moment. Hence, the particle's momentum referred to a particular point,

### Moment (mathematics)

**momentsmomentraw moment**

The concept of moment in physics is derived from the mathematical concept of moments.

The mathematical concept is closely related to the concept of moment in physics.

### Moment of inertia

**rotational inertiamoments of inertiamoment of inertia tensor**

Specifically, it is the second moment of mass with respect to the orthogonal distance from an axis (or pole).

### Polar moment of inertia

**moment of inertiapolar moments of inertiapolar-moment**

Where the planar second moment of area describes an object's resistance to deflection (bending) when subjected to a force applied to a plane parallel to the central axis, the polar second moment of area describes an object's resistance to deflection when subjected to a moment applied in a plane perpendicular to the object's central axis (i.e. parallel to the cross-section).

### Second moment of area

**area moment of inertiaMoment of Inertiasecond moments of area**

In structural engineering, the second moment of area of a beam is an important property used in the calculation of the beam's deflection and the calculation of stress caused by a moment applied to the beam.

### Magnetic moment

**magnetic dipole momentmagnetic momentsdipole moment**

### Physics

**physicistphysicalphysicists**

In physics, a moment is an expression involving the product of a distance and another physical quantity, and in this way it accounts for how the physical quantity is located or arranged.

### Quadrupole

**quadrupole momentelectric quadrupoleelectric quadrupole moment**

The 0th moment (n = 0) is sometimes called the monopole moment; the 1st moment (n = 1) is sometimes called the dipole moment, and the 2nd moment (n = 2) is sometimes called the quadrupole moment, especially in the context of electric charge distributions.

### Momentum

**conservation of momentumlinear momentummomenta**

### Electric dipole moment

**electric dipoledipole momentdipole**

### Center of mass

**center of gravitycentre of gravitycentre of mass**

### Scalar potential

**potentialpotential functionpotential field**

Assuming a density function that is finite and localized to a particular region, outside that region a 1/r potential may be expressed as a series of spherical harmonics:

### Spherical harmonics

**spherical harmonicspherical functionsLaplace series**

Assuming a density function that is finite and localized to a particular region, outside that region a 1/r potential may be expressed as a series of spherical harmonics:

### Multipole expansion

**multipolemultipole momentsmultipole moment**

treatment may be found in pages describing multipole expansion or

### Spherical multipole moments

**spherical harmonic addition theoremspherical multipole moment**

spherical multipole moments.

### Electric potential

**electrical potentialelectrostatic potentialCoulomb potential**

The multipole expansion applies to 1/r scalar potentials, examples of which include the electric potential and the gravitational potential.

### Gravitational potential

**gravity potentialgravitational potential energygravitational**

The multipole expansion applies to 1/r scalar potentials, examples of which include the electric potential and the gravitational potential.

### Wilkinson Microwave Anisotropy Probe

**WMAPWilkinson Microwave Anisotropy Probe (WMAP)WMAP satellite**

but has also been applied to the universe itself, being for example the technique employed by the WMAP and Planck experiments to analyze the cosmic microwave background radiation.

### Planck (spacecraft)

**PlanckPlanck spacecraftPlanck satellite**

but has also been applied to the universe itself, being for example the technique employed by the WMAP and Planck experiments to analyze the cosmic microwave background radiation.

### Cosmic microwave background

**cosmic microwave background radiationCMBmicrowave background radiation**

but has also been applied to the universe itself, being for example the technique employed by the WMAP and Planck experiments to analyze the cosmic microwave background radiation.

### Federico Commandino

**CommandinoCommandino, FedericoCommandinus**

Federico Commandino, in 1565, translated into Latin from Archimedes:

### Archimedes

**Archimedes of SyracuseArchimedeanArchimedes Heat Ray**

Federico Commandino, in 1565, translated into Latin from Archimedes: