Two identical trains travel at the same speed in opposite directions – one from east to west, the other from west to east. Which train is heavier?

A train heading to the west, as its weight is less relieved by the centrifugal force caused by the circular motion around the earth’s axis (it moves against the rotation of the earth).

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.