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The term "momentum" is also used in a more abstract sense to indicate the driving force or impetus of a physical object, a set of circumstances or a course of events. For example, when sales of a particular product or commodity are picking up, one could say that the sales are gaining momentum. The term is also used to describe the success or failure of a career, a sports team, an economy or a military effort.

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Hey, your answer is in the wrong context
The term Momentum is defined as "The product of mass of an object and its velocity." 

When an object having a mass is moving with certain velocity, it is said to have momentum.

It is denoted by P.

Thus, P = mv
where m is mass and v is velocity.
Its SI (MKS) Unit is kg m/s .
Its dimensional formula is [M¹L¹T⁻¹].

E.g. Suppose a car having mass of 1000 kg is moving with a velocity of 72 km/h (20 m/s), then its momentum is:

P = mv
   = 1000 * 20
   = 20,000 kg m/s

The above explanation is for Linear Momentum. There are also other types of momentum like Angular Momentum.

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