Final answer:
The distance between starting to brake and coming to a stop at 30 KM/H varies and depends on reaction time, road conditions, and vehicle deceleration. Without specific data for 30 km/h, exact stopping distances cannot be provided.
Step-by-step explanation:
The distance between starting to brake and coming to a stop when driving at 30 KM/H depends on several factors including the driver's reaction time, the road conditions, and the vehicle's deceleration capabilities. When a driver notices an obstacle and reacts, there's a brief delay known as the reaction time, which commonly is around 0.500 seconds. If we consider a car traveling at a speed of 30.0 m/s (approximately 108 km/h), the stopping distance can be computed using physics equations which involve the car's deceleration rate and the initial speed.
Let's look at this with deceleration rates for dry concrete and wet concrete. On dry concrete, a deceleration rate of 7.00 m/s² results in shorter braking distances compared to 5.00 m/s² on wet concrete. Once the car's deceleration capability and the driver's reaction time are known, we can calculate the total distance traveled from the moment the driver perceives the need to stop (sees the red light) until the car comes to a halt.
Unfortunately, the exact values cannot be given since the references provided do not state clear distances for braking at 30 km/h. However, it should be noted that the stopping distance at the speed of 30 km/h should be significantly less than the values given at 30 m/s, since 30 m/s equals 108 km/h - a much higher speed.