If you brake the front wheel of a fast moving bicycle suddenly, why do the rear wheels jump?

This is because the front wheels are braked and suddenly stop moving, but the people in the car and the rear wheels have to keep moving forward due to inertia, so the rear wheels will jump. Therefore, remember that when driving downhill or at high speed, you cannot brake with the front brake of the bicycle alone, otherwise there will be a rollover accident!

Bicycles, also known as bicycles or bicycles, are usually small land vehicles with two wheels. After people ride on the car, they are powered by pedals, which is a green and environmentally friendly means of transportation. English bicycle.

where bi means two, and cycle means wheel, i.e., two-wheeled vehicle. In Chinese mainland, Taiwan, Singapore, it is usually called "bicycle" or "bicycle"; In Hong Kong and Macau, it is usually called "bicycle" (in fact, it is usually called that in Cantonese); In Japan, it is called "self-car". There are many types of bicycles, including single-person bicycles, tandem bicycles, and multi-person bicycles.

It can be used as an environmentally friendly means of transportation for transportation and travel; More and more people use bicycles as fitness equipment for cycling exercise and bicycle travel; Cycling itself is also a competitive sport, there are road cycling, mountain biking, track cycling, stunt cycling, etc.

In 1790, there was a Frenchman named Sifrak, who was particularly fond of using his brains. One day, he was walking on a street in Paris, because it had rained the day before, and there was a lot of rain on the road, and it was very difficult to walk. Suddenly, a four-wheeled carriage rolled from behind him, the street was narrow, and the carriage was wide, and Sifrak ducked but was not knocked over, but was splashed with mud and rain.

When others saw it, they felt sorry for him, and they were so angry that they scolded and wanted to call the carriage to stop and negotiate reasonably. But Sifrak muttered, "Stop shouting, stop shouting, let them go."

> the carriage was far away, and he was still standing on the side of the road, thinking: the road is so narrow, and there are so many pedestrians, why can't the carriage be reconstructed? The carriage should be cut in half, and the four wheels should be turned into two wheels at the front and ......With this in mind, he went home and started designing.

After trial and error, in 1791 the first "Wooden Horse Wheel" car was built. The earliest bicycles were made of wood, and they had a relatively simple structure, with neither a drive nor a steering device, and the rider pedaled his feet and could only get out of the bike and move the bike when changing direction. Even so, when Sifrak rode the bike for a ride around the park, those present were amazed and amazed.

Because of the high inertia when driving fast, when the front wheel brakes, the body will still keep the original state and drive forward, so the rear wheel will fly.

Because a fast-moving bicycle has a lot of inertia, and once it brakes, it will rush forward, so the rear wheel will jump.

The inertia is also great when the speed is high, and if the front wheel is braked suddenly, the rear wheel will jump up due to inertia.

When braking, the person in the car and the rear wheels have to maintain a state of continuous forward motion due to inertia, so the rear wheels will jump.

This is because the front wheels are braked and suddenly stop moving, which is caused by the inertia of the car.

Inertia, the front suddenly stops, and the rear can only hit up.

Because there was too much inertia at that time, just like people. Usually when the car goes to the right, our center of gravity will be to the left.

That's what physics books say about inertia. Because when you brake behind the wheels still move forward by inertia.

Sudden cessation of movement, due to the principle of inertia, caused the rear wheels to jump.

Because of inertia, the speed in the rear is too fast.

The quickest way for any bike to stop is to apply braking force to the front wheels so that the rear wheels are about to lift off the ground. In this case, the rear brake does not produce backward resistance to the whole vehicle, because there is no pressure between it and the ground, the flywheel is a dead car, that is, a fixed flywheel bicycle, the foot is riding forward, and the foot is backward to ride the bike backwards, that is, the wheel balance is turned, and the pedal is turned.

Front wheel brake principle

The braking of the bicycle is realized by using the rubber fixed on the frame to apply friction to the wheel, and the braking principle of the bicycle is that the wheel is in the process of rotation, and the translational speed is proportional to the angular velocity of rotation, and the wheel is affected by the friction of the rubber in the braking process.

When the angular velocity decreases, the translational speed is greater than the rotational angular velocity, which will cause the contact point to slide, causing backward friction and reducing the translational speed.

Second, the brakes of the front wheels will have better braking consequences, and the response is easier to move to lock, brake locking will play its maximum function, but it is easy to make the car roll forward, and after the brake locking process stops, its braking function will be greatly reduced.

Answer: When the bicycle is traveling fast, suddenly pinch the front brake, the front wheel stops rotating under the greater friction, and the rear wheel should maintain the original forward movement due to inertia

Summary. Hello! The front brake pads of your bicycle will swirl out by themselves, which belongs to the problem of bicycle brakes, and you can contact the merchant to return it.

I bought a bicycle on the Internet, but the bicycle couldn't be ridden for a while, and the brake pad on the front wheel swirled out by itself, causing the front wheel to be unable to move and swollen.

Hello! The front brake pads of your bicycle will swirl out by themselves, which belongs to the problem of bicycle brakes, and you can contact the merchant to return it.

I suggest that you find a merchant to return it, or go to a repair shop to repair it, your brakes are broken, and you need to replace the brakes.

There's no way to fix it? Bikes have been bought for a while.

Good. There is no way to fix it yourself, because your brakes are broken and you need to replace them.

Good. Hope it helps!

Hello, glad to answer for you. First, the rear wheels of the car are the driving wheels, only the front wheels are braked, and the inertia of the rear wheels still has to maintain a state of motion, so there will be a feeling of rushing forward. Second, the front brake pad is seriously worn and cannot provide enough friction to brake the car well.

I hope it can help you.

Explain it to you like this: 1. Generally speaking, the front wheel kills the pig, and the rear wheel jumps up due to the inertia of the car lifting. 2. Why do you say that?

Let's say your bike is driving at high speeds, but at a speed of 3 meters per second. That's what your car is doing at 3 meters per second. Then while driving, you suddenly brake forward, in extreme terms, the front tires travel at a speed of 0 meters per second, but the rear tires do not brake, and the speed is still 3 meters and seconds.

The rear tires cannot be immediately lowered to 3 meters per second due to habitual talk. At this time, there is a state, as if there is a huge stone blocking the way in front of you, the front wheel touches the stone, and the rear wheel must jump up. So much for.

Everything is inertia.

In the case of high-speed bicycle emergency braking, first of all, the rear wheel, when the first one or two seconds you do not have to directly lock the rear wheel, otherwise the braking effect is not as good as the non-locking state, after the rear wheel brake, immediately brake the front brake, here the braking strength of the front brake depends on the adjustment of the front brake, if the front brake is tight, then you need to pay attention to the braking strength, to avoid the front brake instantly killed to cause the front rollover, if the front brake is relatively sent, there is a certain margin from the killing, and the handle can be pulled to the end during emergency braking. It is worth noting that in the case of emergency braking, the front and rear wheels brake at the same time, the body should be slightly depressed, and the hands against the gear knob to ensure that you do not rush forward due to your own inertia, and the body should be moderately moved back to change the center position. In addition to the above steps when I brake in an emergency, I usually swing the gear knob left and right to make an S-shaped trajectory, which can more or less improve the braking effect.

It is best to brake the rear wheel, because after the front wheel brakes, the rear wheel does not brake, due to inertia will jump up, if it is just a turn or even will slide sideways, flick the tail, of course, if you have good technology, it doesn't matter if you are familiar with all aspects of the performance of your bicycle, the impact is not great.

Kill the rear wheels, because the front wheels can still be controlled, but don't pinch them all at once, the car is too difficult to control after the tire dies.

It depends on the situation, it is recommended to bring the brake first, and brake to death in the front brake! If you only use the front brake too fast, the rear wheels will float, and it is more dangerous to brake only the front wheels.

Kill the second wheel first, otherwise it will roll over or slip sideways!!

Answer: Answer: When the bicycle is driving fast, suddenly pinch the front brake, the front wheel stops rotating under the greater friction, and the rear wheel should maintain the original forward branch movement due to the inertia of the stool shirt, and the bicycle is a whole, and the rear wheel can not move forward, so it will jump up