What happens to the vehicle when the brakes lock up?

When the brakes lock up, the wheels stop turning and instead slide along the road surface. This loss of traction significantly impacts the vehicle's handling. When this occurs, the driver loses the ability to steer effectively because the tires can no longer grip the road. Steering relies on the friction between the tires and the surface, and when the wheels are locked, that friction is dramatically reduced. As a result, the vehicle may continue to slide in the direction it was headed, which can lead to a loss of control.

In contrast, if the brakes were functioning properly, they would allow for smoother deceleration and maintain tire grip on the road, enabling the driver to steer and maneuver effectively. Understanding this dynamic is crucial for safe driving, particularly in emergency braking situations.