Calculate the gain of potential energy of a mountaineer of mass 80kg who travels to the top of the mountain Everest 9km above sea level.
The Attempt at a Solution
This is the correct answer but surely it's only an estimate since the value of g 9km above the Earth's surface is 9.83830. Δg=9.8380-9.81= 2.8x10^(-3)?
Is it possible to calculate the exact change is Ep as the mass moves through Δh, rather than using a fixed value of 9.81?