system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What does the gas pedal in your car actually do to increase your speed?
gpt
In older cars it’s physically linked to a cable that opens/closes the engine’s air intake.

With the intake further open, more air enters and the fuel control system (carburetor or fuel injectors) increases the fuel flow in kind.

More air and more fuel makes the engine spin faster, generating more power.

In modern vehicles the direct linkage is replaced with sensors and electronic controls, but the general concept is the same.