: Linear Momentum and Force Physics LibreTexts
Summary. Linear momentum ( momentum for brevity) is defined as the product of a system's mass multiplied by its velocity. In symbols, linear momentum p p is defined to be. p = mv p = m v. where m m is the mass of the system and v v is its velocity. The SI unit for momentum is kg ⋅ m/s. k g ⋅ m / s.