Place 10-12 checkers in a vertical column on the edge of the table. With a quick stroke of the ruler, knock out the bottom checker. What happens then?
if you sharply knock out the bottom checker, the rest will remain in the same place. By inertia, they keep the speed 0, because nothing acts on them and the lower checker does not have time to transfer the action to the upper ones.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.