Give examples of the choice of the zero level of the potential energy reference, relative to which the potential energy of the body will have negative values.
The potential energy of the body will be negative if the body lies in the well, and the zero level is at ground level, or if the body falls from the balcony, and the zero level is at the level of the observer – the balcony.
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.