Buses move from one village to another. The buses were loaded onto a ferry and transported from shore to shore.

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.

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