1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Gravitational Force between two equal masses

  1. Nov 14, 2011 #1
    1. The problem statement, all variables and given/known data

    Two equal masses are precisely 1 m apart from each other. The gravitational force each exerts on the other is exactly 2. What is the value of each mass?

    *a. 1.73*10^5kg

    b. 1.50*10^10kg

    c. 2.50*10^5kg

    d. 1.58*10^10kg

    2. Relevant equations


    3. The attempt at a solution

    I did
    2=G2m/1 (because the masses are equal)

    I dont know why B is wrong and A is right (according to the answer key);
  2. jcsd
  3. Nov 14, 2011 #2

    I like Serena

    User Avatar
    Homework Helper

    Hi physgrl! :smile:

    I'm afraid that [itex]m \cdot m \ne 2m[/itex].
  4. Nov 14, 2011 #3
    uups my mistake :s
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook