What is the first principle about stopping on snow or ice?

The first principle about stopping on snow or ice emphasizes that the brakes are primarily responsible for stopping the wheels. When driving on slippery surfaces, it is crucial to understand that while the braking system is designed to slow down or stop the vehicle, its effectiveness is greatly reduced on snow or ice due to the lack of traction.

By recognizing that the brakes stop the wheels, drivers can apply them in a controlled manner to maintain better control of the vehicle. This understanding helps to prevent skidding or sliding, as sudden or harsh braking can cause the wheels to lock up, leading to a loss of steering control.

While it is also true that tires play a significant role in halting a vehicle’s forward motion by providing traction, their ability to grip the road surface becomes compromised on icy conditions. Thus, while understanding the brake's function is essential, it is equally important to recognize how both the braking system and tire traction interact to ensure safe stopping.