The unit for change in velocity is the same as the unit for velocity itself. Here's why:

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

* Change in velocity is the difference between two velocities.

Therefore, if velocity is measured in units like:

* meters per second (m/s)

* kilometers per hour (km/h)

* miles per hour (mph)

Then change in velocity will also be measured in the same units.

Example:

If a car's velocity changes from 20 m/s to 30 m/s, the change in velocity is 10 m/s.