What is the most important physics rule to remember during driving emergencies?

The most important physics rule to remember during driving emergencies is that steering takes less distance than braking to avoid danger. This principle is crucial because, in many emergency situations, drivers have to make quick decisions to steer away from an obstacle or hazard while simultaneously considering how their car will respond.

When you need to evade an obstacle quickly, turning the steering wheel—if done properly—allows for a more immediate response compared to braking. Braking can take significantly longer, especially if the road conditions are poor or if the vehicle is traveling at a high speed. While a driver might instinctively think of slamming on the brakes in an emergency, a sudden stop could lead to loss of control or even a collision if there's not enough distance to stop safely. Hence, being able to navigate around an obstacle by steering can be a more effective tactic for avoiding a crash.

In contrast, braking on slick roads can lead to skidding, making steering difficult, and striking an object can indeed cause serious damage. Therefore, understanding that steering can be a more effective response than braking in emergencies plays a vital role in ensuring safety on the road.