Question

Можно ли считать материальной точкой земной шар?

Answer 1

Нельзя, т. к. для определения времени восхода требуются некоторые расстояния и углы, а у материальной точки нет ни тех, ни других. Ведь у точки нет размеров!

Answer 2

Can the Earth be considered as a material point?

The Earth cannot be considered as a material point. A material point is a theoretical concept used in physics to simplify the analysis of objects by treating them as point masses with no size or shape. However, the Earth is a complex and massive object with a finite size and shape, so it cannot be accurately represented as a material point.

The Earth is a three-dimensional object with a spherical shape, and its mass is distributed throughout its volume. It has a solid inner core, a liquid outer core, a mantle, and a crust. The Earth's shape is also not a perfect sphere but is slightly flattened at the poles and bulging at the equator due to its rotation.

Treating the Earth as a material point would ignore its size, shape, and internal structure, which are important factors in understanding its behavior and interactions with other objects in the universe.