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If you don't know the basics about 'uniform motion' and 'free fall' that you learned in 3rd year of middle school, be sure to listen to it first before taking this lecture~ Don't ask questions without listening!!!!???? ????????[3rd year of middle school] Lecture on uniform motion and free fall • [3rd year of middle school_Motion and Energy] Lecture 1. What is 'motion'? │What is 'speed'? │Uniform motion... 01:08 What is force? 01:57 Electric force and magnetic force 02:41 Friction force and elastic force 03:26 Gravity, characteristics of gravity 05:45 Mass and weight 07:47 Free fall 10:25 Motion of an object thrown horizontally 12:20 Practice problems My schedule is very busy.. But I made this by dividing my busy time into pieces and hurriedly recording it at night to keep my promise to upload the 1st year of high school unit haha. Q. Why does uniform motion occur when no force is applied? ???????? • Video Q. In a time-speed graph, does the area under the graph that is a triangle correspond to the distance traveled? ???????? • Video