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Physical 0. 1
I am a physics teacher. In our physics teaching, we often encounter such a problem: a big truck is driving at the speed of V and suddenly sees an emergency ahead and needs to brake. Given the friction coefficient of the ground, the response time of the driver is 0. 1 sec. Can the driver park safely? We are not here to solve a problem, but to pay attention to a concept. The reaction time is 0. 1 sec. What is reaction or time? When the human eyes see the situation, the reaction time of the brain to make a judgment is 0. 1 second.

Almost every teacher in Wensu has to stand guard. We often encounter this situation. When you stand at the intersection and see students coming and going in front of the zebra crossing, the signal light turns red. Do you want to go or not? We almost all our students chose to wait, and they made the right choice at 0. 1 second after seeing the red light. But just two weeks ago, when I was standing at the intersection of nursing school, a student rushed over when the signal light just turned red. In fact, many accidents happen like this, just because he firmly believes that he is lucky in this minute. He doesn't believe that danger will happen to him, but it's not luck at all, it's just luck. Finally, the student was lucky to succeed. The brakes sounded and a speeding taxi suddenly stopped in front of the students. Fortunately, he is still safe. But he never thought about it. What if the driver makes a wrong judgment at 0. 1 sec, and the driver steps on the accelerator at 0. 1 sec? What if the driver's reaction time is longer than 0. 1 sec or even later? The ending will really be different. The student did succeed by luck, but it was just a fluke. At the scene of the accident, often 0. 1 second before the accident, they choose to believe in the so-called luck. But in fact, in the case of real accidents, students are not so lucky.

At 5: 40 am on June 5,438+065,438+1October14th, Qinyuan No.2 Middle School organized more than 900 students from Grade 2 and Grade 3 13 to run and exercise on the Fentun Highway. The students ran to the fentun road at 1 18 km and turned around and returned. All the first 12 shifts turn around and go back. When the third shift 12 1 followed, a big truck with the car number Jin D 135 13 suddenly came running like a madman. Amid screams and screams, the students fell to the ground. After a large number of students were "swept away" by the trailer in the east wind belt, it broke the trees on the roadside and drove to the road to stop. 18 people died on the spot, and 2/kloc-0 people were injured, among which Jiang Hua, a 32-year-old physics teacher in charge of the class, was also killed in the accident. The injured were sent to the Second People's Hospital of Qinyuan County, Guodao Town for rescue, and three students died after being rescued. Among the students who died, the oldest was 18 years old and the youngest was 15 years old. The scene of the car accident was terrible. Nearly 100 meters of asphalt road is littered with children's bodies, and 100 meters is full of blood. The front of the big truck was severely deformed, and the right side of the expressway was hit by an accident car, leaving only six poplar trees with broken roots, one of which had been stripped of a large piece of bark, leaving only a miserable white trunk to tell people a terrible scene. After investigation, the driver has been tired of driving for eight hours.

All this makes people feel heavy. If, I say, if there is any, school leaders can deny such a plan within 0. 1 second of making a decision to run off-campus roads, if parents of students can stand out and object within 0. 1 second of knowing the school decision, if cart drivers can make a retrogressive choice within 0. 1 second of choosing fatigue driving, and if students can leave school within 0./. I mean, if any one of them, within 0. 1 second of making a decision, can pause a little, be a little stupid and make the right choice, maybe such a painful thing will not happen.

Behind the accident, not only dozens of fresh lives, but also the future of dozens of families, the pillars of which have disappeared from the world. And these students, still wearing school uniforms, are lying quietly on the desks.

Before that year or even earlier, running schools outside the school seemed to be acquiesced. At that time, we even ran outside the school. Everyone thought it was all right and normal, but there was a big problem in a seemingly normal place. A safety accident that shocked the whole country happened in a place where we thought there was no risk, hidden danger and accident. We often talk about preventing risks, eliminating hidden dangers and curbing accidents. Who can really do it? We are all wise after the event. We just take it as a slogan. We just put it on our lips. Although we will reflect after every accident, it is only reflection. We have never really taken precautions against risks, eliminated hidden dangers and put an end to accidents. Everyone thinks that a simple toilet should be okay, right? But can you imagine that the child went in and never came out? Can you think that biogas with a lid can swallow a child? Can you think that a fire in the lecture hall, which should have been inspected, will cause a large number of deaths? Can't you figure it out? No way, people at that time hesitated in their hearts almost beforehand? But at 0. 1 second of their decision, they chose to ignore it. This reminds me of a sentence in Du Mu's Abang Palace Fu: Qin is not the world. Qin people can't help mourning for themselves, and then others mourn for them. Later generations mourned for them without learning the lesson and mourned for them. We don't want to be bemoaners of time, but we must be accident prevention. The smallest risk is maximized, and the smallest hidden danger is the most serious. It's not alarmist, it's born of worry!

Pain will always make people grow, but the price is really too high. Just like children choose 0. 1 sec when crossing the road, this is the result of education. What we need to do is to teach children to make the right choice in any dangerous situation, or at 0. 1 second when they need to make a choice. To this end, we also need more professionals to participate.

There are too many seconds in our life, can we not give our own fate and that of others to luck? As long as we choose to be silly at that zero point one second and follow those seemingly simple rules, then everyone around us will be happier and safer. If we pay more attention to this 0. 1 second, then you are lucky, because you have never chosen luck.