Understanding Closing Speed: A Guide for North Carolina RADAR State Exam Preparation

If the target speed is 70 mph and the patrol speed is 65 mph, what is the closing speed?

• A. 135 mph
• B. 5 mph
• C. 65 mph
• D. 70 mph

Answer: (A)

The closing speed is calculated by determining the difference in speeds between the target vehicle and the patrol vehicle. In this scenario, the target speed is 70 mph, indicating how fast the vehicle being observed is moving, while the patrol speed is 65 mph, which is the speed at which the enforcement vehicle is traveling. To find the closing speed, you take the speed of the target and add it to the speed of the patrol vehicle when they are moving towards each other. When moving in the same direction, the closing speed is calculated by subtracting the patrol speed from the target speed. In this case, however, the most relevant factor is that the target vehicle is moving faster than the patrol vehicle. Thus, the closing speed would be 70 mph (the speed of the target vehicle) minus 65 mph (the speed of the patrol vehicle), resulting in a closing speed of 5 mph. Therefore, the correct interpretation here is that the closing speed between the vehicles, given that the target is speeding, would indicate the relative approach or distance contraction per unit of time, which helps law enforcement in gauging the situation and responding with appropriate measures. It appears there may be confusion in understanding the calculation; the closing speed in this example

When you're gearing up for the North Carolina RADAR State Practice Exam, it's crucial to grasp concepts that might seem a bit confusing at first glance, like closing speed. Ever wondered how two vehicles moving at different speeds interact? Well, buckle up, because we're about to break it down in a way that makes sense.

So, picture this: the target speed is 70 mph, and the patrol speed is 65 mph. You might be thinking, "What does this all mean?" Let's get straight to the point. To determine the closing speed, we look at how these two vehicles relate to one another. If you're in a race where one vehicle is clearly zooming past at a speed of 70 mph, you'd want to know how quickly they're approaching you, right?

Here's the key: the closing speed is like a scoreboard for speed officers, helping them understand how fast a suspect vehicle is hurtling towards them or, in some instances, how quickly they're closing in on that suspected speeder. So, if you’re ever trying to calculate this yourself, keep an eye on the direction of travel!

Okay, but let’s dig a little deeper into how that calculation actually works. When vehicles are moving toward each other, you add their speeds together to find out how fast they’re closing in on each other. Think of it like two trains on parallel tracks heading straight for a meeting point—it might get a bit complicated! Conversely, if both vehicles are moving in the same direction, like a dial on a clock, you subtract to find the closing speed.

In our scenario, the given target speed (70 mph) is indeed greater than the patrol speed (65 mph). So, here's where some might trip up—what’s the closing speed? You actually subtract the patrol speed from the target speed, which gives you a closing speed of 5 mph. Simple enough, right? But remember, in law enforcement, understanding this helps officers like you gauge their response tactics.

Now I can hear some of you asking—why does it matter? Well, knowing about closing speed can help determine how they might pursue a vehicle and prepare for that interaction once they catch up. It's not just about numbers; it's about situational awareness on the road.

One last note: don’t get tangled up with the math too much. It's more about understanding the context of the situation and how it plays into law enforcement tactics. Keeping these principles in mind as you prep for the North Carolina RADAR State Exam will certainly set you up for success.

So, the next time you flick on that radar and check the speed of a passing vehicle, remember these concepts, and you'll confidently ace that exam. Smooth sailing awaits with the right knowledge at your fingertips!