Why is it hard to ride a bicycle when it is out of gas? 5

Think of it this way, when the car is out of gas, due to the weight of the person and the car, the tire will be flattened, and in this way, the contact area between the tire and the ground will increase, so the friction between the car and the ground will increase, so it will be difficult to ride.

If you look at a junior high school book, there is an equation about friction: friction = f s. I think there may be a relationship between area and friction factor.

Oh, I don't know much about that! Maybe it's hard to ride if you don't have anything to make the belt bulge! The belt is lame if there is no gas, how can you ride it if the gas is not enough at all?

I guess so! Just understand it yourself!

When the car is out of gas, due to the weight of people and the car, the tires will be flattened, and in this way, the contact area between the tires and the ground will increase

This is the relationship between pressure, force, and area under force. The pressure remains the same, and the larger the force area, the greater the force. Typical example: 4 wheels of a sedan are enough. And the big trucks have a row of wheels underneath.

The bicycle seems to move forward by friction with the ground.

All of the above is wrong: The bicycle is out of gas, easy to start, because of the friction, but easy to stop after starting, not easy to add force, because the resistance is large, so it is difficult to ride,, Note: friction = = resistance.

If you release the balloon, will it still roll? It's the friction of the rubber ring + the body + your weight! Of course, you can't ride without the gas in the tires as support!

I guess it's an air leak! Air tires generally appear like air leaks every few days, which is normal! If not, it is a problem with other accessories, 1. Pay attention to tire pressure.

When you feel that the air pressure of the tires is insufficient, you should replenish it in time to maintain the consistency of the tire pressure of the front and rear wheels.

The tire pressure is low, the tire is easy to wear, and the service life of the tire is reduced; Continuing to drive when the rear tire pressure is too low and completely shriveled can easily cause tire scrap and even motor deformation.

2. Clean the tire oil.

Electric vehicle tires are rubber products, and consumers should not stick to oil stains such as engine oil, kerosene, and gasoline when riding or parking electric vehicles, so as to prevent rubber from aging and deteriorating.

3. Do not overload.

More than 95% of electric vehicles do not have a rear tire support frame, and only rely on the rear wheel and unilateral support frame to support the weight of the body, and the rear tire can only bear dozens of kilograms.

When the electric vehicle is overloaded, it will cause the motor and circuit to overload and heat, which will affect the service life of the electric vehicle, and may even cause the motor to be damaged.

This may be the case that the tire's inflator is damaged, which can also lead to a flat air. When this happens, you need to replace the tire or a new inflator nozzle.

Today my calf us, riding on a small slope, the rear wheel instantly ran out of gas, thinking that the tire was punctured, with questions to the authorized store, the master looked, not pierced, the result is completely out of gas! If the tire is punctured, it will not run out of gas instantly.

Causes:

After buying it for 5 months, I didn't hit the gas once, which caused the tire pressure to continue to be low, and finally it was lower than the critical value of pressure retention, and I ran out of gas instantaneously when riding.

Solution: Just replenish the air, and the front wheels can also be replenished by the way.

It is recommended to refill the gas for 2 months, my car is us, the shop master told that the front tire pressure. Rear tire pressure.

Repair**: Take the official authorized store in Beijing as an example. Pump up for free. 10 yuan for 1 repair. Rescue depends on the distance, you have to talk.

Other things to note:

After the tire is completely deflated, it is not recommended to continue riding, which will cause damage to the sidewall of the tire. Go to the Maverick app to see if there is a nearby store, or other shops that repair electric vehicles and cars can cheer up. If there is no nearby store that can cheer up, you can also find a calf shop for help.

If you find that the tires are out of gas, you must first set up a tripod, slowly turn the wheel of the air out, carefully check whether there is something left on the tires, if there are any things left on the tires, if there are any to remove them before pushing, if it is not when you push, and then cause multiple punctures, your tires will be wasted. In order to save effort when implementing, you can also turn on the power and turn the knob a little to help. Find the nearest car repair shop and fix it.

Don't push too far, or your tires will be scrapped.

Follow-up: Is it a new car, do you go to the place where the car is sold to inspect it, or do you go to the repair place to repair it?

Follow-up: If you want to save trouble, go to the car repair shop.

If you find that the tires are out of gas, you must first set up a tripod, slowly turn the wheel of the air out, carefully check whether there is something left on the tires, if there are any things left on the tires, if there are any to remove them before pushing, if it is not when you push, and then cause multiple punctures, your tires will be wasted. In order to save effort when implementing, you can also turn on the power and turn the knob a little to help. Find the nearest car repair shop and fix it.

Don't push too far, or your tires will be scrapped.

There should be damage to the inner or outer tube.

Find a car repairer to check to see if it is broken, and repair it will solve the problem.

If it's serious, you'll have to change the tire.

If you find that your tires are flat while riding your bike, you can follow these steps to deal with it:

1.First of all, try to press the pedal harder, if you feel that the pedal is sinking, you can tell that the tire is flat.

2.If you are sure that your tires are flat, then you need to find out why. It could be that something sharp in the place where you parked punctured the tires of your car, or that the tires were naturally flat.

3.Then, you'll need to find out if there's a nearby place to repair your bike. If there is a place to fix the bike nearby, you can push the bike over and ask them to help inflate it.

4.If there is no place to repair your bike nearby, you may want to consider using a built-in pump or a manual pump to inflate your tires.

5.If you're not familiar with using these tools, you can find tutorials or ask others.

6.Finally, if you can't find a tool or can't inflate it, you may need to give up your bike and find another mode of transportation.

In short, when the tire is flat, you need to find out the original cause of the problem, and then take appropriate measures to solve the problem.

The bicycle has no gas and continues to ride will damage the inner tube, as well as the steel wire, so that the steel rim is deformed, people will feel too much vibration and discomfort when riding on it, the bicycle tire has no gas, and the regret oak is generally punctured by the buried foreign body, such as iron nails, broken glass, wire, etc., in this case, you should stop riding the bicycle immediately, and find a repair shop nearby to repair the bicycle.

In this case, the tire pressure is a little low, and suddenly the tire and the wheel hub are separated from the bump.

If the electric car is out of gas while driving, park the electric car in a safe place as soon as possible, and then call ** to the electric car after-sales, and ask the after-sales service to send a master to check whether the electric car is out of air or a tire leak, and if it is leaking, it is necessary to repair the tire. If you continue to ride the electric car without gas, the tires will break.

Precautions for electric vehicle tires.

Electric vehicle tires also have a service life, usually around 3 years, beyond this quiet life, electric vehicle tires begin to age, and begin to harden and crack, continued use will lead to tread deformation, there is a risk of puncture.

In addition, the friction and grip of the tire rubber will be seriously affected, and there may be no braking during emergency braking, and the braking distance will be extended. Therefore, generally speaking, electric vehicle tires should be replaced after they have passed their useful life.

When the tire is fully inflated, it is about round. When the tire is airless, the rolling friction becomes sliding friction, and the friction increases. Bikes are harder to ride.

Rolling friction is an effect that hinders rolling due to the asymmetrical deformation of the contact surface when an object rolls on another object or has a tendency to roll. There are two types of rolling friction: static friction and dynamic friction. When the wheel placed on the bearing surface is stationary and has no rolling tendency, the deformation of the wheel and the bearing surface is symmetrical, and the supporting force of the bearing face on the wheel passes through the center of mass of the wheel, and the wheel remains balanced.

When the wheel rolls or has a rolling tendency, the deformation is asymmetrical, and the point of action of the supporting force moves forward.

When one of the two objects that remain relatively stationary and are in contact with each other is affected by an external force and has a tendency to roll relative to the other object, the force that prevents the relative rolling occurs is the static friction of rolling static friction. Its force increases with the increase of the external force, but it has a maximum. This maximum value is called the maximum static friction.

The direction of this force is opposite to that of the external force. The magnitude of the maximum static friction is directly proportional to the magnitude of the positive pressure of the two objects.

The force that hinders the relative rolling of two objects that are in contact with each other when one of them rolls without slip relative to the other is called rolling friction. In the absence of external forces, the rolling friction will cause the relative rolling velocity to gradually decrease to zero. Its direction is opposite to the direction of the relative velocity.

The junior high school physics textbook says that "rolling friction is much smaller than sliding friction", which is to consider rolling friction as an equivalent sliding friction. When the cart moves forward at a constant speed, the force of the thrust and the static friction of the support on the wheels is balanced with the rolling friction. This means that force must be exerted through the center of the wheel to make the wheel roll at a uniform speed, and if the rolling friction is regarded as an equivalent sliding friction, it can be called the "rolling friction factor" (in the study of the dynamics of wheel rolling, it is often called the rolling drag factor), which is a dimensionless quantity.

Since the δ is much smaller than r, δ r, much smaller than the coefficient of sliding friction, it is said that rolling friction is much smaller than sliding friction, that is, the rolling friction coefficient in this sense is much smaller than the sliding friction coefficient.

Explanation 1 is caused by the increase in rolling friction, which can be explained in this way by a single specific process.

Suppose the contact point between the tire and the ground is B, the front point is A, and the rear point is C.

When the air of the tire is relatively sufficient, the elasticity of the tire is great. When the tire rolls forward, point A becomes point B, at this time, due to the deformation of the tire, the pressure must do work on point A, because w = fs, f is the pressure on point A, and S is the distance of deformation. Since the air of the tire is sufficient, the deformation of the tire is relatively small, that is, the S is smaller, so that the W is smaller.

And at this time, because the point b of the pressure has reached the position of point c, it will no longer bear the pressure, it will return to its original shape due to the internal gas pressure, so that it will produce a thrust on the ground, because the direction of this force is directed to the position behind the center of the circle, so the moment generated by this force is to push the tire forward. In other words, the elastic force generated by the work done to overcome the deformation of the tire in turn pushes the tire forward. In other words, almost no energy is wasted.

When the tires are low on gas, the elasticity of the tires is minimal. When the tire rolls forward, point A becomes point B, at this time, due to the deformation of the tire, the pressure must do work on point A, because w = fs, f is the pressure on point A, and S is the distance of deformation. Because the air of the tire is not sufficient, the deformation of the tire is relatively large, that is, the S is relatively large, so that the W is relatively large.

And at this time, because the pressure point B has reached the position of point C, it will no longer bear the pressure, but it will not be able to return to its original shape quickly because the pressure of the gas inside is very small, so it cannot produce a thrust on the ground. In this way, the original work done on point A is wasted, so there is a loss of energy.

So it will feel laborious.

In addition, due to the loss of the elasticity of the tires, the unevenness of the ground will inevitably cause the car to produce strong vibrations, and these vibrations will inevitably waste a lot of energy.

Explanation 2: When the tires are full, the contact surface between the wheels and the ground is small, and the main thing that exists at this time is rolling friction. When the air is out, the tire skin is soft, the contact surface with the ground is large, and a large part of the friction force becomes sliding friction. So it took a lot of effort.

It's like if you're walking on ice with rollers and it's easy to slip up, but it's not easy to slide with a pair of cotton shoes. It's pretty much the same.

The tires of the car are flat, just like walking in the desert is very strenuous. Walking in the desert is laborious because people do the work, and transfer it to the sand to move to do the work. Similarly, when the tire is out of air, the energy of the tire deformation is provided by the work done by the car.

That is, the bicycle is out of air, the tires are constantly deformed, and energy consumption is constantly generated. The energy consumption generated by deformation is all the energy generated by our labor. So the bike is out of gas and it's harder to ride.

The bike is hard to ride when it is airless, not because the rolling friction becomes sliding friction. Because the greater the friction force, the less likely it is to produce relative displacement. On the contrary, if the friction is too small, it is easy to displace, or even idle, and the wear is more serious. Therefore, it is more difficult to ride and has little to do with ground and tire friction.

Increased friction between the tires and the ground.

The stupid big guy is defeated by the French big v from now on.

The bike reduces the resistance in the horizontal direction to a very small level, so you only need to apply a small amount of force in this direction to move forward; In addition to overcoming the resistance in the direction of progress, the legs also need to use a lot of strength to support the weight of the body when walking, otherwise the person will fall, while when riding a bicycle the person is sitting, the legs do not have to provide too much support force, just a little strength to maintain stability and balance.

When riding on a straight road, the center of gravity of the human body is always at the same height, and the car moves forward by the rolling of the wheels, except for the resistance of the air, only a small rolling friction needs to be overcome. When a person walks, the center of gravity of the back foot is raised, and the walker has to overcome gravity to do work, and the center of gravity of the front foot is reduced, and the gravitational potential energy is converted into other forms of energy. Although the transmission machinery of the bicycle is laborious machinery, the force of pedaling on a straight road is generally less than the force of pedaling the ground when walking, and because the pedal pedal for a week, the wheel can roll forward for several weeks, compared with walking, if the distance is the same, the cyclist has less leg flexion and extension.

Therefore, cycling is less laborious and labor-saving than walking.