If you double your speed, how much more distance will it take to brake to a stop?

When you double your speed, the stopping distance increases significantly due to the physics of motion. The relationship between speed and stopping distance is not linear; rather, it involves the square of the speed. Specifically, stopping distance is directly proportional to the square of the vehicle's speed.

If you imagine a scenario where you are traveling at a certain speed and it takes a particular distance to stop, when you double that speed, you are effectively increasing the kinetic energy of the vehicle (because kinetic energy is proportional to the square of the speed). Consequently, the stopping distance will increase by a factor of four. Therefore, if it takes a certain distance to stop at one speed, at double the speed, it will take four times that distance to bring the vehicle to a complete stop.

This principle is crucial for drivers, particularly those operating large commercial vehicles, as it highlights the importance of maintaining safe speeds and following distances to ensure adequate time to react and stop safely.