You place a book on top of a spring and push down, compressing the spring by 10 cm. when you let go of the book, it is pushed up by the spring. which statement describes what happens to the energy of the spring-book-system?

The gravitational potential energy of the system increases.

Explanation:

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)