During braking, what is the primary outcome of friction?

The primary outcome of friction during braking is a decrease in speed. When brakes are applied, the friction between the brake components (such as brake pads and rotors) and the wheels generates a force that opposes the motion of the vehicle. This opposing force acts to reduce the kinetic energy of the vehicle, resulting in a decrease in speed. The effectiveness of this process is crucial for safely bringing the vehicle to a stop, as friction is what allows the braking system to translate the driver’s input into reduced velocity.

In terms of vehicle dynamics, while factors such as stability and weight distribution can be influenced during the braking process, the fundamental and immediate action taken by friction is to slow down the vehicle. Thus, decrease in speed is the correct outcome to focus on when considering the role of friction in braking.