Take with a friend on a dynamometer, connect them with hooks and start stretching. Observe the dynamometer readings. Make a conclusion.

The dynamometer readings will be the same, therefore, the forces with which the bodies act on each other are equal in magnitude and opposite in direction.

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.