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aero_zeppelin
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Homework Statement
How much energy is required to move a 1 000-kg object
from the Earth’s surface to an altitude twice the Earth’s
radius?
Homework Equations
U = - G Me m / r
The Attempt at a Solution
I'm just using the above equation with 2r (twice the radius) and get 3.1 x 10e10 J, but the book says different...
Any help?? Thanks!