How to calculate the braking force and braking distance of a motorcycle?

According to the principle of dynamics in relation to momentum and force.

mv=ft。。。1

m-Mass. V-speed.

f - Acting force.

t-time. Here, the braking force f=mgk... 2

g - acceleration due to gravity.

k- coefficient of friction.

Bring in 1: MV=MGKT

v=gkt...3

Braking distance. s=1/2vt=1/2gkt^2。。。4 It can be seen that the factors that determine the braking distance are the coefficient of friction and time.

It is also possible to convert 4 to the following formula:

s=v*v/2gk...5

In this way, we know that the braking distance is directly proportional to the square of the speed and inversely proportional to the coefficient of friction.

In turn, the speed is calculated based on the braking distance:

v=√￣s/2gk...6

For general highways, the coefficient of friction of tires on the road surface is asphalt pavement.

Cement pavement, except for those prefabricated with friction grooves on cement pavement.

For example, a normal car is driving on an asphalt road at a speed of 72 km/h (let k = forward sudden sudden braking, then braking distance:

s=20*20 2*10*10*Calculated as 10, convenient) s=400 16=25 meters.

The braking distance is basically the same under the condition that the brakes are working normally, not overloaded, and dry roads, and it has nothing to do with the size of the tires.

Here is a little more basic knowledge of kinetics:

1.Frictional force.

The size depends on the mass and coefficient of friction, and does not depend on the contact area (except in extreme cases)2The friction force is large when static and small when moving, but it increases with the increase of velocity, and the relationship curve between the friction coefficient and the velocity is a concave U-shaped curve.

Test method for braking performance of motorcycles and mopeds Braking distance.

GB T State Bureau of Technical Supervision 1996 04 10 approved 1996 11 01 implemented.

The test vehicle must be tested at the following specified speeds:

a The designated speed of the moped is 20 2 km h;

b The designated speed of motorcycles is 30 2 km h.

Use Eq. (1) to correct the measured braking distance.

s=s0（v/v0）2 ……1）

where: s - corrected braking distance, m;

s0 - measured braking distance, m;

v - specified initial velocity, km h;

v0 – actual initial velocity, km h.

Calculate braking deceleration using Eq. (2).

a=v2/ ……2）

where: a - deceleration, m s2;

v - specified initial velocity, m s;

s - corrected braking distance, m.

Two tests were carried out at the braking distance at each specified initial velocity, and the data were recorded in the table in Appendix A (Supplement), and the smallest value of the arithmetic mean of the corrected braking distance was taken as the braking distance value of the tested motorcycle, and the calculated value was retained to two decimal places after the modification.

National Standard General Standards):

s (braking distance) squared divided by 130), reaction distance v 1000 where v is the vehicle speed.

For high-speed railways, when the train brakes on the bridge, it creates a longitudinal force on the seamless line. The relative displacement between the rail and the beam body causes a force on the rail and bridge due to the presence of nonlinear resistance to the beam and rail, which is known as the braking force.

Including the braking force of the rail and the braking force of the bridge pier.

As for the mechanical model, longitudinal nonlinear springs are usually used to simulate the nonlinear interaction between beams and rails, and beam elements with rigid arms are used to simulate bridges, which proves to be able to correctly simulate the interaction between seamless lines and bridges.

What kind of car are you?It seems that the braking distance of the domestic 125 is within 30 yards, 7 meters. 6 meters is good.

The safe distance of 30 km is 7 meters.

The most straightforward way to do this is to measure the length of the tire's brake marks on the ground

It's more practical.

Motorcycles are a favorite means of transportation for many young people, because riding a motorcycle is really cool, and it can also show their attitude. However, the speed of the motorcycle is different, the braking distance is also different, if you drive at a speed of 50 kilometers per hour, the braking distance is 18 meters, and if you travel at a speed of 100 kilometers per hour, the braking distance is 84 meters. The road surface is different, and the braking distance will also vary.

However, the most important point is that the braking distance can judge the quality of the motorcycle, because in the process of braking, it is related to the contact area of the tire and the configuration of the braking system. <>

Everyone has their own preferences, so it's really cool to see all kinds of young friends racing motorcycles on the road, and it can make people relax, but there are many motorcycle brands, so it will make everyone pick and choose. Each motorcycle is different, and the main performance is also different, so when you judge the braking distance, you must judge the speed at which you drive, so that you can measure the most accurate value. <>

However, the braking distance has a great relationship with the braking system of the vehicle, so when braking, the number of pistons, the diameter of the brake disc or the matching of the whole system are very important, and can also reflect the quality of the motorcycle. However, it also has a certain relationship with everyone's driving skills, and for some people with good driving skills, this distance can be controlled at the lowest value. However, if the car is poor, the values will be adjusted accordingly.

Therefore, it is recommended that you must test drive when buying a motorcycle, and at the same time listen to the opinions of your friends, so that you can buy a particularly good motorcycle. Moreover, in the process of driving the motorcycle, we also need to constantly ponder, so as to make our own technology go further. But you still have to search for the corresponding standard value on the Internet and buy according to the standard value, so that you will not make mistakes, and you can also ensure that the motorcycle you buy is very suitable.

70 km/h – 25m. The quality of the motorcycle can be judged by the braking distance of the motorcycle. Okay, motorcycles generally brake very well.

The general braking distance is the distance of meters. If there is a motorcycle with a long braking distance, then it means that the performance of the motorcycle is not particularly safe, and there may be breakdowns and accidents.

You can't judge the quality of a motorcycle just by the braking distance. If conservatively estimated, the braking distance of the motorcycle 50 km h should be about 15m, if it reaches 80 km h, it is likely to reach about 36m.

The braking distance of the motorcycle at different speeds mainly depends on the friction of the road surface, the grip of the tires and the braking force of the braking system, so different models will have different performance, and the vehicle will have a very important factor in the braking process, that is, the reaction speed and operation skills of the driver and passengers, so there will not be a very standard answer to which motorcycle has the shortest braking distance.

Let's take a look at the performance of the car in this state first, because the data of the motorcycle is relatively small, but there are some approximate reference values, so we can only refer to the corresponding data of the car for analysis.

According to relevant data, the braking distance of the car is 30 kilometers per hour, 50 kilometers per hour, 60 kilometers per hour, 70 kilometers per hour, 80 kilometers per hour, 100 kilometers per hour, taking into account the characteristics of the motorcycle, the braking distance will be extended.

Since the four wheels of the car brake at the same time, the braking distance will be shorter, while the motorcycle will have a longer braking distance at the same speed, due to the different braking specifications and operation methods, and the actual braking distance will be different when different riders of the same model are operating. If conservatively estimated, the braking distance of the motorcycle 50 km h should be about 15m, if it reaches 80 km h, it is likely to reach about 36m. Of course, this braking distance is certainly not noticeable.

All in all, the faster the motorcycle, the longer the braking distance will be. However, if the braking performance of the vehicle is strong, the tire grip is good, the driver and passengers are sensitive, and the operation is appropriate, the braking distance will be shortened accordingly. However, staying vigilant and maintaining a reasonable speed is the only magic weapon for driving safety, because the effective braking distance may not be able to play its due role under certain conditions.

Motorcycle braking means braking, and the role of braking is for all vehicles, that is, when the vehicle needs to slow down while driving, or a measure taken when parking directly, and the brakes must be used correctly, otherwise it is not good for the whole motorcycle, everyone should know that the motorcycle has two brakes, one is the front brake, and the other is the rear brake.

First of all, in the process of high-speed driving, you need to keep the distance between the car or stop, the braking force of the front wheel must be greater than the strength of the rear wheel, but the front wheel should not be completely locked, otherwise it is easy to push the back and then roll over, that is to say, if it is not completely locked, this can stop the motorcycle smoothly and safely, and the wear is relatively small, after all, the speed of the motorcycle is too fast.

The second is that in the process of driving the motorcycle emergency stop, the front wheel and the rear wheel brakes should not all be locked, and the buffer period should be left appropriately, otherwise it is easy to affect safety, and finally when driving on a smooth road, the brakes must be carried out successively and then the front wheel, so as to avoid slipping, everyone should know the danger of slipping, that is, the collision of the rear car and then the formation of a traffic accident, at this time it reflects the importance of maintaining the distance between vehicles.

In summary, it is necessary to use the brakes correctly, otherwise it will lead to brake damage in advance, and it is necessary to regularly check whether it is in a state of failure, if so, do not go to repair, be sure to replace it directly, which is also for your own safety.

According to the motorcycle manual: the motorcycle braking distance of 30km h is 7m.

meters of braking distance about 7 km h and meters of about 5 6 km h

There was a little sand on the road, so it should have been a little slower. In short: slower than the normal speed of a bicycle.

I have used motorcycles for nearly 20 years, and I only know that braking is the braking system.

Braking means braking.

Braking is braking, and braking methods are divided into drum brakes and disc brakes.

1. How to properly brake the motorcycle first release the throttle, straighten the body, the front brake is the main rear brake as the auxiliary, brake first and then brake, and then the front brake, with the engine braking, must not brake to death, to let the wheel rotate slightly, do not let the wheel slide but to roll. 2. Basic skills of how to brake correctly on motorcycles: the strength of the front wheel brake must be greater than the strength of the rear wheel at high speed.

The distribution of braking strength during high-speed braking is generally 60-90, with 6 or more in the front and 6 in the rear, 7 in the front and 8 in the rear and 2 in the rear (not absolutely). 3. How to brake correctly on the motorcycle, and the strength of the front wheel brake at high speed must not make the front wheel lock. When braking uphill, the braking force of the front wheels can be appropriately larger.

When going uphill, the front wheels are higher than the rear wheels, so the front brake can use a little more force.