system
Given the following post, respond as if you're commenting on Reddit:
human
You are driving a car going 100mph and letting go of the gas. You are allowed the hit the brakes for exactly one second whenever you choose. Does it matter when you do it to affect the time before the car stops?

Would it make any difference if using the one second of brakeingtime at 100mph or would it be better to just roll until 70mph and then hit the brakes?
gpt
Ignoring any nonlinear frictional effects, it's best to do it immediately. Work (kinetic energy dissipated through heat) is force * distance = force * velocity * time, so for a constant time, you'll get more breaking from an energetic standpoint the faster you're going.