Practical background and basic concepts of flat vector ppt (Changchun version) courseware

The actual background and basic concepts of flat vectors. Read page 74 of the textbook and consider the following questions: 1. What are the characteristics of physical quantities such as time, distance, and work? What is it called? 2. What are the characteristics of physical quantities such as force, displacement and velocity? What is it called? 3. What is a vector? Quantity? Detection: 1. Is age, height, length and area a vector or a quantity? (5 points) 2. What are the two elements of a vector? (5 points) 3. The gravity of an object is 18N, please draw a schematic (1cm means 10N) (5 points)

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