**Linear momentum**is a vector quantity defined as the product of an object's mass, m, and its velocity, v.

**Linear momentum**is denoted by the letter p and is called “

**momentum**” for short: Note that a body's

**momentum**is always in the same direction as its velocity vector. The units of

**momentum**are kg. · m/s.

Thereof, what is the principle of conservation of linear momentum?

It is called the

**principle**of**linear momentum**, or balance of**linear momentum**. If there are no forces applied to a system, the total**momentum**of the system remains constant; the law in this case is known as the law of**conservation of (linear**)**momentum**.What does it mean for linear momentum to be conserved?

Such a situation implies that the rate of change of the total

**momentum**of a system**does**not change,**meaning**this quantity**is**constant, and proving the principle of the**conservation of linear momentum**: When there**is**no net external force acting on a system of particles the total**momentum**of the system**is conserved**.What is the definition of the law of conservation of momentum?

**conservation of momentum**. A

**conservation law**stating that the total linear

**momentum**of a closed system remains constant through time, regardless of other possible changes within the system.