What is the difference between determining the average speed of a body in mechanics and determining the average speed of gas molecules?

The average speed in mechanics is considered for a body, considered a material point. The average velocity of gas molecules is calculated for all gas molecules in the aggregate.

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.