1. Physical principle: In the process of automobile braking, the change of acceleration depends on the interaction among braking force, friction force and inertia force. The braking force is generated by the braking system, the friction force is generated by the friction between the tire and the ground, and the inertia force is the car itself. When the braking force is greater than the friction force, the car will accelerate, and when the braking force is less than the friction force, the car will slow down.

2. Influencing factors: Automobile braking acceleration is influenced by many factors, such as vehicle speed, braking system performance, friction coefficient between tire and ground, etc. These factors need to be considered comprehensively when analyzing automobile braking acceleration.

3. Braking strategy: Different braking strategies may lead to different braking acceleration. For example, when braking suddenly, the braking acceleration may be greater; When braking slowly, the braking acceleration may be smaller. Therefore, in the actual driving process, the driver needs to choose the appropriate braking strategy according to the actual situation.

4. Safety: Automobile braking acceleration has an important impact on driving safety. When the braking acceleration is too large, the vehicle may be out of control; If the braking acceleration is too short, the braking distance may be too long, increasing the risk of traffic accidents. Therefore, when analyzing automobile braking acceleration, we need to pay attention to its influence on driving safety.