A 0.80-kg book moves verticallyupward a distance of 17 m, andthen vertically downward 17 m,returning to its initial position.
a) How much work is done by gravity during the upward motion of the book?
b) How much work is done by gravity during the downward motion ofthe book?
c) What is the total work done on the book by gravity during thecomplete round trip?
d) On the basis of your answer to part (c), would you say that the gravitational force is conservative or nonconservative? Explain your answer.