- #1
AdrianMachin
- 40
- 2
Homework Statement
The best relative gravimeters have a relative uncertainty of 10-12, that corresponds to a height difference of 3 µm.
Homework Equations
g∝(1/r2)
The local gravitational acceleration g outside the Earth is proportional to 1/r2, which means (Δg)/g = -2 (Δr)/r. With (Δg)/g = 10-12 we get Δr = 0.5 * 10-12 r where r is the radius of Earth.
The Attempt at a Solution
I've tried to get to the equation I highlighted in red, but I fail. I know it has derived from taking derivatives, but my derivatives result in different equations.
g∝1/r2 → g=k(1/r2) → ?