Question

A student in Denver (altitude = 1 mile =
1609 m above sea level) brings a physics book
of mass 1 kg to the top of a ten story building
of height 35 m and holds the book over her
head 128 cm above the roof.
What is the gravitational potential energy
Ug of the book?
1. Ug = 16140.2 J
2. Ug = 355.907 J
3. Ug = 0 J
4. Cannot be determined
5. Ug = 12.5568 J
027 (part 1 of 3)

Answer 1

With respect to sea-level we have
Ug=mgh=1(9.8)(1609+36+1.28)
which seems to be pretty close to the first answer.
not exact though :/

Answer 2

It's exact if you use g=9.81 :)

Answer 3

details details haha