If you double your speed, what happens to your braking distance?

When you double your speed, the kinetic energy of your vehicle increases, which significantly affects your braking distance. Kinetic energy is proportional to the square of the speed, meaning that if you double your speed, the amount of kinetic energy increases by a factor of four (2^2 = 4). Since the braking distance is directly related to the amount of kinetic energy that needs to be dissipated in order to stop the vehicle, it follows that an increase in speed results in a much greater increase in braking distance.

Thus, if you double your speed, your braking distance will increase four times, confirming that choice C is correct. This understanding emphasizes the importance of moderating speed in various driving conditions, as higher speeds require much longer distances to safely stop.