Rolling speed is the rate at which a vehicle changes position relative to a given point. It is defined as the velocity of the center of mass of the vehicle plus the velocity of any external force acting on the vehicle, over the time period that this acceleration occurs.
In general, rolling speed refers to how fast a vehicle moves while remaining in contact with a surface. The surface can be either land, water, or air. There are different names for rolling speed depending on the surface type.
When driving a car or truck, it is important to know your maximum rolling speed. Knowing this will keep you safe when trying to navigate hills, sharp turns, and fleeing situations.
This article will discuss how to determine your maximum rolling speed and how this relates to hill safety.
Article: How Fast Can You Go Up A Hill Before You Fly Off The Road? | Sciencedaily.https://www.sciencedaily.com/releases/2018/06/180603155537.htm
Hill assist technology was developed to aid drivers going up steep hills. This technology controls your cars throttle and maintains a set speed depending on what you select on your car’s hill assist feature setting. It works by continuously monitoring your cars current speed and whether or not you have pressed down on the gas pedal or shifted gears into a higher gear ratio. There are two main components that play a role in determining your car’s maximum possible uphill climbing ability. These components are the transmission gear ratio and engine torque output.
Understand how to determine the curve of a road
The speed at which you can travel down a hill depends on how curved the hill is. How does one determine how curved a hill is?
The best way to determine the curve of a road is by using an app called Road Graph. This app uses GPS to measure the length of the road and then draws all of the turns and twists on the map.
It then measures how much distance is covered in each turn and connects the dots to show the overall layout of the road. By doing this, it shows how sharp or curved each turn or part of the road is.
By looking at this layout, you can see what speed you can travel at without going over control.
Take into account the effect of the wind
When moving forward, a car can only achieve a certain speed before the wind pushes it back. This speed is called the cut-off speed.
To understand this concept, imagine you’re walking with your arms extended and you feel a slight push back. This is the wind affecting you. You know that if you decrease your speed, you will feel less of a push back, and if you increase your speed, you will feel a stronger push back.
The same thing happens with a moving vehicle. If the wheels of the vehicle are moving at a certain speed, then the wind will push it back at that same speed. If the vehicle speeds up or slows down, then the amount of push-back from the wind changes too.
When driving on ice or in snow, your car has less traction which causes your vehicle to need to travel at a higher speed to keep from slipping and sliding. The cut-off speed increases due to this fact.
Assume a constant force pushing the car forward
Now, let’s go back to our original thought experiment: A car on a straight road, with no external forces acting on it.
Imagine for a moment that the car is being pushed forward at a constant speed, let’s say 60 miles per hour. How does the car know how to respond?
It doesn’t — we do! We, as human beings, are constantly processing information about our surroundings and ourselves and responding to it.
We know our own weight and how hard we have to push ourselves to move ourselves forward — we have internalized this knowledge through years of experience.
If you are walking, you may shift your weight left or right to keep your balance; if you are running, you may increase your speed or change your gait to keep moving forward. These responses are automatic — we don’t have to think about them.
Look at the angle of the road
The steeper the hill, the faster you can go before you fly off the road. That may sound strange, but it’s true.
Think about it this way: If you were to drive at a constant speed up a steep hill, your vehicle would have to push against a high level of resistance-more so than on a flat surface.
Because of this increased resistance, your vehicle would need to increase its speed to keep moving forward. This is what we call velocity-the speed your vehicle is moving.
So, if you were to drive slowly up a steep hill, your vehicle would have to go very fast to keep moving forward. Driving faster reduces the time your vehicle is in contact with the surface of the road; this reduces the force of friction between the two and allows you to go faster.
Calculate how far you can go before reaching the top of the hill
To calculate the maximum speed at the top of the hill, you have to find the maximum speed at which you can go before skidding or sliding off the road.
Because we know the car can’t go faster than the speed of gravity, we can assume that the maximum speed at the top of the hill is equal to zero. Therefore, the car can’t just keep speeding up without coming to a stop.
To find this maximum speed, you have to determine what grade of slope (the angle of inclination) the road has at the top of the hill. The steeper (higher) the slope,the lower this maximum speed will be.
Given that driving your car at a very high speed might cause it to veer off course or cause it to crash, you have to find a balance between going fast and staying on course.
Calculate how sharp an angle you can take without flying off the road
So, let’s go back to our first example: A car can take a hill at 45 degrees without flying off the road.
But what if you wanted to go faster? What if you wanted to travel at 50 miles per hour up the hill? How sharp of an angle can you take then?
Well, because we already know that the car can take the hill at 45 degrees without flying off the road, we know that the car can take a slope of half a circle (since one full circle is 360 degrees).
So, let’s divide 45 by 2 and we get 22.5. This means that the car can travel up a hill with a 22.5 degree slope before it flies off the road.
Use your common sense when driving a car
A very important factor when driving a car is your average speed. How fast you travel from point A to point B matters a lot, especially in terms of safety.
Many accidents are caused by excessive speed. This is true whether we are talking about a car, motorcycle, truck, or any other type of vehicle. Speed can be a powerful weapon when used properly, but it can also be very destructive.
How fast you drive your vehicle depends on the situation. If there is heavy traffic and you are traveling at a slow speed, then keep up with the flow of traffic. If there is no traffic or you are going to a place where there is adequate room for driving, then you can increase your speed accordingly.
Keep in mind that common sense plays an important role in determining your average speed. For instance, if it is raining out and you notice that other vehicles are slowing down, then it would be wise to do the same in order to prevent an accident.
Ask an expert if you are not sure
Once you have a plan, it is time to ask an expert for help. If you are not sure how to test your car or truck’s speed at the top of the hill, you can contact a mechanics shop or auto body shop for help.
They have experienced professionals that have dealt with many cars and trucks of all makes and models. They will be able to tell you what speed the car should go up the hill without flying off the road.
They will most likely ask you some questions about the car and what happens when it goes up the hill. They will then let you know what speed the car should have to avoid flying off the road at the top of the hill.
Contacting a mechanic or auto body shop is an easy way to get help from an expert. You will most likely receive helpful information that prevents your car from flying off the road at the top of the hill.