If you want to get started in skiing, one of the most important things you need to know is how to reduce friction for a perfect glide on the slopes.
You don’t want friction to hinder you from building your skiing ability and learning the various ski techniques.
When skiing down a mountain, gravity forces pull our bodies down, and through our legs and skis, we are able to ride downhill.
Any sort of friction we encounter while skiing downhill can slow us down or even interfere with our ability to ride down the mountain.
For this reason, there is a need to research and come up with solutions to overcome the friction and ride smoothly.
A recent study on how to reduce ski-snow friction to improve athletes’ performance reveals that friction results from a combination of several forces, and there are a number of ways to overcome them.
Skiers can reduce snow friction even before they set off to ride on the mountain. They can easily achieve this by preparing their skis adequately before hitting the slopes.
In this article, we’ll talk about how to reduce friction when skiing and uncover why friction can sometimes be helpful to a skier on the slopes.
Three Key Friction Forces to Overcome When Skiing
As mentioned earlier, a combination of several factors results in snow friction when skiing, and three key forces dominate among these factors.
This includes static friction, air resistance, and the friction between the skis and the snow. Let’s have a look at these forces and how they affect skiers on the slope.
Static friction happens when friction counterattacks the force applied to put an object into motion. This way, the object remains still until the static friction force is overcome.
In skiing, we can say that static friction is the force that keeps skiers at rest. When you are at rest or standing still, the skis can suddenly become loose, even when you have not made a move or any physical change.
The amount of static friction here is more than the kinetic friction, which stops objects from moving.
Likewise, it is always hard to push yourself on a flat surface when standing on your skis. But when you are already in motion, the amount of static friction reduces, and it’s easier for you to propel or push yourself forward with less kinetic energy.
Friction Between the Snow and Your Skis
The second type of force is the friction between your ski and snow as you ride on the slopes.
When skiing downhill, your skis push hard against the snow creating friction. For this force, we use Newton’s third law of motion, which states that there is always an equal and opposite reaction for every action.
This simply means that the pressure of force you exert with your skis onto the snow is equal to the force of the ski slope pushing back against your skis.
You may find this concept strange to comprehend, but it’s the reality. The equal repelling forces of your skis against the snowy slope and the snow effectively pushing you back brings about kinetic friction, which slows you down.
So, if you don’t find ways to overcome such friction, you may not be able to glide effectively or ride at high speeds for a downhill skiing thrill.
Friction from Air Resistance
When skiing down the mountain, air resistance can create friction and slow you down since you are riding in an open environment. It becomes even worse if you are skiing against strong winds.
As you ski downhill, your body separates the air in front of you. And since you need force to pass through the air, your body uses the energy of your motion.
Once the air goes behind you, it closes around your back, forming a turbulent shape, which in turn slows your movement.
What is Kinetic Friction in Downhill Skiing?
Kinetic friction in downhill skiing is a type of friction created when you push your skis against the snow to move downhill.
This, in turn, results in the production of kinetic energy, which simply means the energy possessed in motion. Subsequently, kinetic energy creates thermal energy.
Thermal energy is the heat produced when skis touch or slide on the snow surface. When there is more friction when skiing, it generates more thermal energy and, consequently, heat, which can melt the snow.
The more heat you create when skiing instead of accelerating, the slower your progress rate downhill.
When you apply more pressure, your skis push harder onto the snow, creating more stress on the snow underneath. With such pressure on the surface, the snow will easily melt.
With that said, your skis slide on the snowy slope due to the kinetic energy created when you are in motion, which produces some heat that melts a thin layer of snow.
The thin layer of water created when the snow melts allows your skis to slide with less snow resistance. But once you are gone, the melted snow quickly refreezes back to ice.
However, this may not be the case when skiing in powder snow. The energy transfer from your skis to such terrain is less efficient.
With less energy transfer, there is limited heat generated, which translates to less snow melting. That’s why the surface in powder snow feels less slippery.
Another essential thing to note is that skis tend to glide on the line that has the least friction.
If you ride down the mountain with parallel skis, you’ll expend less energy since there is less resistance than what you experience when making wedge turns.
For this reason, most skiers, especially competitive ones, usually take the most direct route down the hill to minimize friction and increase speed.
How to Minimize Friction Between Your Skis and the Snow
As you start gaining speed when skiing downhill, kinetic energy will build up from your motion. The friction between your ski and the snow produces heat, but this doesn’t necessarily increase your speed.
So, this thermal energy produced as you move down the mountain goes to waste as it doesn’t help your riding speed.
If you want to feel the thrill of skiing downhill at high speed, you need to reduce the friction between your skis and the snow.
The best way to do this involves waxing the base parts of your skis to ensure that you use less energy to glide.
Most skis come with a base made of polyethylene and graphite (p-Tex), which ensure less friction when riding.
Waxing ski bases will prevent them from feeling dry as you ride to ensure that you enjoy smooth and faster skiing on the mountain.
The Best Way to Protect Your Skis from Excessive Friction
Whether skiing on a hard or softer snow surface, your skis or snowboard will gradually dry and wear off if you don’t give them proper care and maintenance.
You should regrind your skis and wax them often to keep them sharp and lubricated for your adventures on the snowy slopes.
If you don’t want to do the maintenance job, you can always take your gear to the nearest ski rental shop to restore them to a new condition.
The first step of properly caring for and maintaining your skis entails sharpening the edges. Keep in mind that blunt skis can reduce performance and hinder your ability to control speed.
Burred edges can also make it difficult for you to make sudden stops when needed, so you want to regrind your skis regularly and remove all the burrs.
Once your skis are sharp enough to dig into the mountain effectively, you need to wax the ski base. Waxing lubricates your skis and protects them from outdoor elements like water, which could trigger rusting.
Waxing Your Skis for Better Speed
If you have just acquired your new skis, you may wonder whether there is a need to wax them. The answer will depend on your experience and the conditions in which you intend to ski.
If you are a brand new skier, there is no need to wax your new skis, as you are likely to ride on nursery slopes to learn the skill and practice.
To wax your snow, you need to bring some melted ski wax and pour it onto the base. Then spread the hot wax evenly over the ski base with a hot iron and leave it to cool.
If you realize that you used too much wax, you can easily remove the excess layer using a steel ski scrapper before brushing off the surface with a soft brush.
For most recreational skiers, hydrocarbon or hot wax works well, and it’s a cheaper option compared to fluorocarbon waxes.
However, if you want high-performance wax, you can never go wrong with fluorocarbon ski wax, especially if you are an advanced skier who rides on wetter snow.
There are also rub-on waxes that are an ideal short-term solution for all conditions, but they are not as effective as hot hydrocarbon and fluorocarbon waxes.
So, how often should you wax your skis? Well, there is no single or straight answer to this question, as a number of factors come into play.
While professional skiers prefer to wax their skis after every run, some people rarely lubricate their gear. It all comes down to the conditions you ride on, the frequency, and the type of experience you are looking for.
Here are a few tips to guide you on how often to wax your skis for the best experience skiing:
- Wax your skis whenever you want to ski in a new region with wetter or drier snow than your regular conditions.
- When skiing in powder snow, wax your skis more than you would when skiing on regular snow, as they quickly get blunt.
- Wax your skis every four or five skiing days if they have an extruded base, as they lose wax faster than sintered bases.
- Wax your skis when you notice a white-gray coating on the bases.
- Wax your skis whenever you feel the snow sticking in the base as you ride.
- Wax your skis when the ski season is over to prevent them from drying out, but save the excess coating and scrap it at the start of the next season.
- Wax your skis if you feel like they are slowing your skiing speed, but be sure to consider other factors that may slow you down, like your clothing and snow conditions.
What is the Tuck Position?
A tuck position means assuming a streamlined posture when skiing down the mountain. You can achieve this position by squatting down on your thighs with your chin bent to the chest to reduce your body’s surface area.
Assuming a tuck position when skiing plays a significant role in reducing the friction that results from air and wind resistance since your body surface area is greatly minimized.
With reduced air or wind resistance, your speed when moving down the mountain will increase and give you the fun you are looking for.
However, you need to get back to your straight position when making turns to ensure that your skis glide effectively.
Does Your Clothing Affect Air Resistance on the Slopes?
Yes, your clothing can also affect air or wind resistance and, in turn, your style and speed. Wearing ski pants and a ski jacket that does not fit you properly can increase drag and friction.
There is always a compromise when wearing skiing clothes, as you don’t want to sacrifice comfort or speed.
When you wear ski clothes that are too loose, they are likely to slow you down as they increase your body surface area. Loose clothes increase drag that eventually slow you down and make you feel tired within a short time.
On the other hand, wearing clothes that are too tight when skiing can restrict your movement and make you feel uncomfortable on the slopes.
Tight clothes also hinder blood circulation in your body, so you may start feeling numb while skiing. So, it’s important to strike a good balance between comfort and the need to reduce resistance.
The best way to ensure you get the right fit when buying your ski clothes is to choose a ski jacket or ski pants that are a bit loose than the designed fitting. Keep in mind that you’ll wear them over your inner layers.
You also need to ensure that your arms and shoulders are comfortable and flexible enough since you’ll assume different movements and make turns on the slope.
Another important factor to keep in mind when wearing for smooth and comfortable skiing is the insulation and breathability of your clothes.
These aspects may not necessarily affect your speed or increase friction, but they can make a difference in your overall riding experience.
When your clothes are not warm enough for the cold weather, you are likely to freeze on the slopes, which means that you’ll not be able to ski at your desired pace.
Similarly, wearing clothes that are not breathable when skiing means that you’ll lock a lot of moisture in, and you might end up soaking up in your sweat. With such discomfort, you may not be able to ride at your desired speed.
What are the Benefits of Snow Friction in Snow Surface Skiing?
From a scientific point of view, skiing is actually not your enemy when skiing. While it can significantly reduce your speed when skiing, friction has several benefits.
First, it would be impossible to stop when skiing downhill unless you hit an object like a rock or tree to halt your momentum.
Being able to stop when skiing is crucial as you may want to catch your breath or even make a few adjustments to your gear or clothing.
Friction also gives skiers control over the direction in which they go and manipulate their speed to suit their skiing needs.
Another reason why friction is not your enemy is that it helps you move forward when skiing uphill. Cross-country skiers would find it impossible to ski up the mountain if there was no friction at all.
Q: How is Friction Reduced in Skiing?
A: Skiers reduce drag and the frictional force caused by air or wind by wearing clothes that fit properly and assuming a tuck body posture in cross-country and alpine skiing.
To assume the tuck position, you need to bend your upper body towards your knees with your chin bent to your chest.
In alpine and cross-country skiing, skiers reduce friction by waxing skis and taking advantage of the gravitational pull when descending.
A blunt and unlubricated ski melts snow when a heavier skier attempts to ride down the mountain since there is more pressure and thermal energy production. When skiing with skis that are not waxed, you are forced to work harder to be able to glide on the snow.
The good thing about waxing is that you don’t have to coat the entire ski, as only the base needs more lubrication for smooth rides down the mountain.
Going in the same direction or following a straight line can also help minimize friction when riding on the slope.
Q: What Forces Are Involved in Skiing?
A: There are three key forces involved in skiing, including static, air resistance, and the friction between the skis and snow.
Static friction is the type of force that keeps you at rest. When you want to start moving while wearing your skis, it can be difficult to push yourself due to static friction.
It becomes even harder when standing on flat ground, but the friction reduces once your body gets into motion.
Skiers usually take advantage of the gravity force in downhill terrain to reduce static friction and gain speed. The steeper the slope, the higher speeds you can easily achieve when skiing.
When it comes to air resistance, your body is naturally susceptible to drag since it has a surface area. So, you have to part air in front of you to be able to move forward when skiing.
And when air gets behind you, it forms a turbulent pattern that increases drag and pulls you back. If you want to reduce drag caused by air resistance, you can assume a tuck position when skiing downhill.
Tucking reduces friction by decreasing the surface area of your body, which means that you only need to displace less air when moving down the mountain.
Wearing clothes that fit your body correctly can also help reduce the drag caused by air or wind resistance and keep you comfortable on the slopes.
The friction between the ski and the snow when skiing exists because your skis press against the snow underneath, exerting pressure on the snow surface.
And for every force exerted on a surface, there is an equal, but the converse force on the surface pushes back against the pressing object.
So, your skis can easily wear off with such kind of friction or make it hard for you to control your movement on the snow. The best way to deal with this type of friction is to lubricate your skis regularly with the appropriate wax.
Q: Which Force is the Skier Trying to Minimize?
A: When skiing on the slope, the skier is trying to minimize three different forces that may slow them down.
These forces are static friction, air resistance, and the friction between the skis and the snow.
The skier reduces these types of forces by waxing skis, wearing the appropriate clothing with a proper fit, and assuming a tuck position when riding downhill.
Q: How Does a Skier Use Friction?
A: While skiers are always looking to minimize the three different forces involved in skiing, friction is still useful on the slopes.
It comes in handy in rugged terrain when exploring the backcountry on your skis. Without friction, it would be impossible for skiers to move uphill or across steep terrain when wearing skis.
Low friction is also crucial in downhill skiing as the thermal energy produced helps in melting some snow, allowing skiers to glide effortlessly on the ski surface.
If you want to enjoy riding on your skis and use friction to your advantage in downhill skiing, you should consider stone grinding and waxing your ski for a smooth experience.
Friction can greatly slow you down when skiing, so it’s important to look for effective ways to reduce it.
With minimized friction, you can easily achieve fantastic speeds that will give you the skiing thrill many skiers yearn for when riding downhill.
The best way to reduce friction when skiing is by dealing with the three forces that cause drag on the slopes, including static force, air resistance, and the friction between your skis and the snow.
If you want to ski with less friction, you should wax your skis often and wear ski clothes that fit you properly to minimize drag and achieve higher speeds.
The tips provided above should help you wax your skiing gear when needed, but if it’s too much work for you, you can always take them to a ski shop for regrinding and waxing.