Homework Help: Gravitational Force of Particles

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1. Apr 9, 2016

heartshapedbox

1. The problem statement, all variables and given/known data
There are three particles;
1) 26kg at 12i-hat
2)13kg at -5j-hat
3)13 kg at 5j-hat

A) What is the gravitational force on the 26kg mass due to the 13kg mass at -5j-hat

2. Relevant equations
F= GMm/r^2

3. The attempt at a solution
A) IN COMPONENTS;
Y Component
F=6.67E-11(13)(26)/5^2
9.01E-10 j-hat
X Component
F=6.67E-11(13)(26)/12^2
=1.57E-10 i-hat

I have solved this problem before in the exact same way and gotten the correct answers. I don't know why there answers are incorrect. Could someone point it out please? Thanks.

2. Apr 9, 2016

heartshapedbox

ā1.2Eā10i-hat ā5.1E-11 j-hat

3. Apr 9, 2016

heartshapedbox

Still unsure how the attempt to solve is wrong, help please?

4. Apr 9, 2016

256bits

@heartshapedbox
Is the distance between the objects 5j, 12i, or some other number?

5. Apr 10, 2016

heartshapedbox

Yes that's the distance!

6. Apr 10, 2016

haruspex

No it isn't.
If fred is 3 m in front of you and Ella is 4m to your right, how far apart are Fred and Ella?