The linear momentum( or momentum) of an object is defined as the product of its mass and its velocity.

symbol	meaning	units	SI unit	basic SI units
m	Mass	Kilogram	`kg`	`kg`
v	Velocity	meter per second	`m//s`	`m//s`
p	Linear Momentum	`kg•m//s`	`kg•m//s`	`kg•m//s`

The direction of the momentum is the direction of the velocity, and the magnitude of the momentum is `p = mv`. The more momentum an object has, the harder it is to stop it, and the greater effect it will have if it is brought to rest by striking another object.