system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does it mean when a scientist says ‘per second per second’?
gpt
It means that the rate of change itself changes.

"meters per second" is speed - the rate of change of an object's position. "meters per second per second" (m/s^(2))  means the rate of change of the object's speed, i.e. acceleration.

If a car is accelerating at 10 meters per second per second then it means that every second, its speed gets 10 m/s faster.