Pushing the gas pedal of a car increases its velocity. In physics terms, this change in velocity is called:

1. The stem describes a velocity that is changing over time, which is exactly what acceleration measures. 2. The introduction to this topic states: "Pushing on the gas pedal results in acceleration because the velocity of the car increases, and acceleration is defined as a change in velocity." 3. Displacement describes a change in position, not velocity; average speed and reference frame do not describe a rate of change at all. 4. So the correct term for this change in velocity is acceleration. _Source: OpenStax Physics Ch 3 "Acceleration", p.97 §3.1 Acceleration_