Knock on the blackboard and draw the key points! Teacher Zhang Chong taught you how to easily handle the kinetic energy theorem.
Release time:
2022-01-28
These problems have been perplexing front-line teachers, when it comes to kinetic energy theorem verification experiments, Senior high school physics teachers have begun to pour bitter water: usedoting timerThe experimental process to verify the kinetic energy theorem is too complicated,large amount of calculationThe whole blackboard is densely written!the error is quite largeDuring the demonstration experiment, there was no way to fully consider the friction between the paper tape and the dotting timer, the friction between the trolley and the track, and the deviation caused by human measurement. Most of the class time was spent on experimental verification,Too much waste of time!
How to balance friction to reduce experimental error?Teacher Zhang Chong teaches you to easily verify the kinetic energy theorem
On August 24, Zhang Chong, a physics teacher from Yanling No.1 High School in Xuchang City, Henan Province, participated in the Henan Middle School Physics Teaching and Research Staff Training and Quality Class Competition on behalf of Xuchang City. In the competition, Mr. Zhang Chong explained his teaching design and experimental ideas in detail.
It is quite different from the traditional experimental method. In order to stimulate students' interest and arouse their enthusiasm, Mr. Zhang Chong introduced the new lesson with the concept of kinetic energy, and created his own experiment of small ball collision glass to explore the influencing factors of kinetic energy.
When completing the experiment, he used self-made teaching aids, used two electromagnets to attract and release the balls respectively, and explored the strength of the balls of different masses falling freely from the same position and the balls of the same mass falling freely from different heights to collide with the glass respectively. The sensory impact of the experiment was strong. Experimental verification of the kinetic energy theorem,Mr. Zhang Chong used the advanced Suwell trolley rail system.
Before the start of the experiment, by adjusting the height of the support rod to make the car do uniform linear motion can beBalanced friction. During the experiment, the direct usephotoelectric gate sensorAccurate measurement of the speed and displacement of the trolley movement, through the pulley andforce sensorConnect and measure the pulling force of the car. After clicking the "Start" button on the digital software, release the car to start collecting data and draw the data image at the same time, which is very intuitive.Experimental data accuracy is very high,It saves a lot of calculation process and accurately verifies the kinetic energy theorem.
Suweir digital experimental instrument effect is obviousThe judges and teachers got up to take pictures.
In the course of the lecture, the Suwell digital experimental instrument used by Mr. Zhang Chong attracted the attention of many teachers, and the teachers on the sceneVery satisfied with the results of the experiment,Get up and take pictures..
Very accurate! The friction force is balanced before the experiment. The photoelectric gate sensor uses non-contact measurement, and the experimental error is small.
This is shocking! The digital experimental software supports one-click calculation, which saves a lot of calculation process and saves teaching time!
Digital experiment software is very powerful, can directly fit the image according to the collected data, very intuitive!
On August 24, the Henan Province Middle School Physics Teaching and Research Staff Training and Quality Class Competition was successfully concluded in Henan Pearl Hotel, Zhengzhou City. In the end, Mr. Zhang Chong won the recognition of the judges with his innovative experimental methods and teaching design.On December 13, the official website of the Henan Provincial Department of Education announced the results of the selection. Teacher Zhang Chong won the "first prize" of the competition ".
Introduction of famous teacher:
"Excellent Teacher" Zhang Chong
Zhang Chong works as a physics teacher and head teacher in a high school in Yanling No.1 High School, Xuchang City, Henan Province. With his solid teaching skills and novel and diverse teaching forms, he meticulously built experimental classrooms, and actively devoted himself to teaching research and teaching reform. He has been rated as "excellent teacher" and "excellent class teacher" for many years ". In July 2015, won the "special" award of high-quality class in Xuchang city. In November of the same year, he won the first prize of "one teacher, one excellent lesson, one teacher" in Xuchang city. In March 2016, he won the first prize of the first information technology discipline integration competition in Xuchang city. In September 2017, the subject of the research, "Research on Teachers' Teaching Methods under the New Curriculum" Three Pieces and Four Pieces ", passed the acceptance. In August 2018, he won the first prize of Henan Province Quality Class Competition. In October, as a representative of Henan Province, he participated in the class exhibition of Chinese famous teachers and won awards.
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