* Kinetic Energy: A faster car has more kinetic energy (energy of motion). This means more energy needs to be dissipated to bring the car to a stop.

* Braking Force: While braking force remains relatively constant, the time it takes to apply that force to stop the vehicle increases with speed. This is because the vehicle needs to travel a longer distance before it can be brought to a complete stop.

* Reaction Time: Even with the same reaction time, the distance a car travels before the brakes are applied increases dramatically with speed. This is simply because the car is covering more ground in the same amount of time.

Here's a simple analogy: Imagine rolling a bowling ball down a lane. If you roll it slowly, it's easy to stop. But if you roll it fast, it takes much more force and distance to bring it to a halt.

Important Note: The relationship between speed and stopping distance is not linear. In other words, doubling the speed doesn't just double the stopping distance. The increase in stopping distance is much greater.