In which frame of reference is it better to consider the movement: an astronaut on the Moon; a car overtaking a moving bus in front;

In which frame of reference is it better to consider the movement: an astronaut on the Moon; a car overtaking a moving bus in front; a ball falling into the water from a boat moving along the river?

Astronaut on the Moon: reference body – Moon: Car catching up with the bus: reference body – bus: Ball falling into the water from a boat: reference body – boat.

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.