Tell us about the strength of a normal reaction: to which body is it applied? from which body is it attached?

Tell us about the strength of a normal reaction: to which body is it applied? from which body is it attached? what is its physical nature? how is it directed?

The normal reaction force acts on the body from the side of the support on which the body is located; by its physical nature, this is the elastic force, directed perpendicular to the support surface.

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.