The conclusion that an inclined plane does not give a gain in work is consistent with the law of conservation of energy.

We cannot get a gain in work, since nothing disappears and does not appear again, but can only pass from one type of energy to another.

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.