Gravitational Force between three forces

  • Thread starter DRC12
  • Start date
  • #1
41
0
1. Homework Statement [/b]
There's a 20kg ball and two 10kg balls 20cm above it. One of the 10kg balls is 5cm to the right of center and the other is 5cm to the left of center. What is the net gravitational force on the 20kg ball

2. Homework Equations [/b]
F=GMm/R2


3. The Attempt at a Solution [/b]
M=20kg, m=10kg, G=6.67E-11 and R=√(.202+.052)=.206m
[itex]\Sigma[/itex]Fx=0; because the 10kg ball are equal distances away from the 20kg ball along the x-axis
[itex]\Sigma[/itex]Fy=2*(((6.67*10-11*10*20)/(.2062))*(.2/.206))=6.1*10-7
I know the answers supposed to be 3*10-7
 

Answers and Replies

  • #2
TSny
Homework Helper
Gold Member
13,084
3,407
Your work looks correct to me.
 
  • #3
41
0
All right thanks I'm just going to assume the books wrong it wouldn't be the first time
 

Related Threads on Gravitational Force between three forces

Replies
4
Views
5K
Replies
3
Views
4K
Replies
16
Views
968
  • Last Post
Replies
17
Views
12K
Replies
2
Views
1K
Replies
1
Views
8K
  • Last Post
Replies
3
Views
10K
  • Last Post
Replies
11
Views
3K
Replies
4
Views
2K
Replies
11
Views
2K
Top