Buses move from one village to another. The buses were loaded onto a ferry and transported from shore to shore. In what case can buses be mistaken for material points, and in what case – not? Why?
Buses can be taken as a material point in both cases when the distance over which the buses travel will be many times greater than the size of the buses themselves.
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.