- #1
ddn87
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Homework Statement
Compare the gravitational force on a 9 kg
mass at the surface of the Earth (with radius 6.4 × 10^6 m and mass 6 × 10^24 kg) with
that on the surface of the Moon (with mass 1 /81.3 ME and radius 0.27 RE ). What is the force on the Earth?
Answer in units of N.
Homework Equations
I need to use this equation... F(from 1 to 2)= G(m1m2/r^2) r(from 1- 2)
The Attempt at a Solution
I know that G is a constant which equals 6.67 x 10^-11. I believe and m1 and m2 are the masses of Earth and the object respectivly. I believe the r^2 is the radius of Earth squared. I am just not sure where r(from1-2) is i know that it is a vector. please help !