How to calculate average speed? What is the formula for calculating average speed? What are the characteristics of the subject of physics in Vietnam's General Education Program in 2018?
What is speed? What is average speed?
To understand what speed is and what average speed is, as well as how to calculate average speed, you can refer to the following content:
Speed is a quantity used to describe the rate of motion of an object, whether it is fast or slow, and it describes the direction of motion. When determining speed, the unit of measurement for speed depends on the unit of measurement for distance traveled and the unit of measurement for time taken to travel that distance. The measurement system used in physics is the International System of Units (SI), which is defined as follows:
- The unit of measurement for distance is the meter (m).
- The unit of measurement for time is the second (s).
As the unit of measurement for speed is determined by the unit of measurement for distance and the unit of measurement for time, the unit of measurement for speed is meters per second (m/s).
Similarly, average speed is also a physical quantity used to determine the speed of movement, whether it is fast or slow, as well as the direction of movement of a person or an object. However, average speed is determined as the speed of a person or an object, but this speed varies and changes over the time of movement of that person or object.
How to calculate average speed? What is the formula for calculating average speed? What are the characteristics of the subject of physics in Vietnam's General Education Program in 2018? (Image from the Internet)
How to calculate average speed? What is the formula for calculating average speed?
The formula for calculating average speed is as follows:
Where:
v (avg) is the value of average speed.
r is the final position, r0 is the initial position.
t is the final time, t0 is the initial time.
(r - r0) is the displacement of the object.
The formula above represents the value of average speed. If it accurately represents the nature of the speed quantity, it is necessary to add arrows (the symbol of vectors) above each quantity of v and r because they are quantities with direction.
In addition, it is necessary to differentiate it from the average velocity, which is defined as the total distance traveled divided by the time interval considered.
Where:
v is the average velocity.
s is the total distance traveled in the time interval considered.
t is the time interval considered.
s1, s2, ..., sn are the component distances traveled corresponding to the component time intervals t1, t2, ..., tn.
What are the characteristics of the subject of physics in Vietnam's General Education Program in 2018?
According to the Physics Curriculum issued with Circular 32/2018/TT-BGDĐT, the characteristics of the subject of physics in Vietnam's General Education Program in 2018 are as follows:
Physics is a branch of science that studies the simplest and most general forms of motion of matter and the interactions between them.
In general education, physics education is implemented at all three levels with different levels of complexity.
In the basic education stage (primary school and lower secondary school), the content of physics education is addressed in subjects such as Natural and Social Sciences (grade 1, grade 2, grade 3); Science (grade 4, grade 5); Natural Sciences (from grade 6 to grade 9).
In the career orientation education stage (upper secondary school), physics is a subject within the Natural Sciences group, chosen based on the students' desires and career orientations. Students with career orientations that require the application of physics knowledge and skills study additional specialized topics. The subject of physics helps students continue to develop the qualities and abilities that have been shaped in the basic education stage, creating conditions for students to recognize their own abilities and strengths and have a positive attitude towards the subject. Based on the foundational content provided to students in the basic education stage, the Physics Curriculum selects the most practical core issues and emphasizes highly applicable problems that form the basis for many engineering, scientific, and technological fields.
Experiments and practical activities play a crucial role in forming concepts, laws, and principles of physics. Therefore, the Physics Curriculum focuses on training students' ability to understand the properties of physical objects through various experimental and practical content.
The Physics Curriculum emphasizes the development of students' ability to apply the knowledge and skills they have learned to understand and solve certain practical issues, meeting the demands of real life. It ensures the development of physics competence, which is an expression of natural science competence, while also meeting the career orientation requirements of students.
Through the Physics Curriculum, students form and develop a scientific worldview, cultivate confidence, honesty, objectivity, and appreciate the beauty of nature. They develop a love for nature and take pride in their homeland's natural environment. They respect the laws of nature, preserve and protect nature, and engage with nature in a manner consistent with sustainable development requirements. At the same time, they develop self-directed and self-learning abilities, communication and collaboration skills, problem-solving skills, and creativity.
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