Δv = v₂ - v₁

where:

* Δv represents the change in velocity

* v₂ is the final velocity

* v₁ is the initial velocity

Important Notes:

* Velocity is a vector quantity, meaning it has both magnitude (speed) and direction.

* Therefore, the change in velocity also considers both the change in speed and the change in direction.

* The units of velocity are typically meters per second (m/s) or kilometers per hour (km/h).

Example:

If a car starts from rest (v₁ = 0 m/s) and accelerates to a final velocity of 20 m/s (v₂ = 20 m/s), the change in velocity is:

Δv = 20 m/s - 0 m/s = 20 m/s