system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If motion causes friction, and friction causes heat, why does wind (which is air in motion) get colder the faster it blows?
gpt
You’re right, it does have friction which produces heat but this is minimal compared to the cooling effect. 

Wind blows away the warm air from the surface of our skin and helps our sweat to evaporate (I’ll write at the end why this helps) and these effects are larger than that of the friction. 

Tangent: sweat evaporating cools us down because the molecules with the most energy (heat) evaporate first, thereby taking away more than their fair share of heat, hence the average temperature of the sweat decreases.

Edit: you’ve probably seen the extreme effects of friction from the air when seeing things enter the atmosphere in films.