PDA

View Full Version : Universal law of gravity question


Rgonzales
Oct4-07, 05:44 PM
1. The problem statement, all variables and given/known data

The question is: What is the distance between the moon and the earth if the mass of the moon is 7.34 x 10(to the power of 22) kg and the force of attraction between the two is 2.00 x 10(to the power of 20) N?

Mass of the moon = 7.34 x 10(to the power of 22) kg
Attraction = 2.00 x 10(to the power of 20) N
Gravitional constant = -6.67 x 10(to the power of -11) N.m(squared)/kg(squared)
Mass of the earth = ?
Distance between earth and moon = ?

2. Relevant equations

F = G x m1 x m2
r(squared)


3. The attempt at a solution

First, im pretty sure that i first need to find the mass of the earth. After, i will be able to sub in all the information to get the answer. I just need help to find the mass of the earth. Please help me.

Doc Al
Oct4-07, 05:51 PM
Just Google "mass of earth".

Rgonzales
Oct4-07, 07:07 PM
got it. thank you