# Momentum meaning

(physics) A quantity used to measure the motion of a body, equal to the product of the body's mass and its velocity.

noun

Momentum is defined as the amount of motion occurring in something that is moving, or the force that drives something forward to keep it moving.

An example of momentum is how quickly a car is moving down a hill.

An example of momentum is the encouragement of your parents, which keeps driving you forward and encouraging you to continue to succeed.

noun

The impetus of a moving object.

noun

Strength or force that keeps growing or building.

A campaign that gained *momentum.*

noun

The impetus of rising or falling prices.

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(philosophy) An essential or constituent element; a moment.

noun

(physics, mech.) The product of the mass of a particle, body, etc. and its velocity.

noun

A measure of the rate of change in prices, instead of the actual price levels. Momentum is a tool used in technical analysis.

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A vector quantity that expresses the relation of the velocity of a body, wave, field, or other physical system, to its energy. The direction of the momentum of a single object indicates the direction of its motion. Momentum is a conserved quantity (it remains constant unless acted upon by an outside force), and is related by

**Noether's theorem**to translational**invariance**. In classical mechanics, momentum is defined as mass times velocity. The theory of Special Relativity uses the concept of**relativistic mass**. The momentum of photons, which are massless, is equal to their energy divided by the speed of light. In quantum mechanics,**momentum**more generally refers to a mathematical operator applied to the wave equation describing a physical system and corresponding to an**observable**; solutions to the equation using this operator provide the vector quantity traditionally called momentum. In all of these applications, momentum is sometimes called*linear momentum.*