Question

What is the gravitational force between two identical bodies with a mass of 2.0*104 kg each if they are 3.0 m apart?
A. 3.0*10-3 N
B. 8.9*10-3 N
C. 1.5*10-7 N
D. 4.4*10-7 N

Answer 1

u solved the other one.. u should be able to solve that one too :O

Answer 2

Well I think its D. But I dont think its correct. @Mashy

Answer 3

why do you think so? would u mind showing me ur work?

Answer 4

F = Gm²/d²
3 = Gm²/ 3²
8/G = m² and (G = 6.674281 x 10^(-11))

and then I get lost

Answer 5

how did u get 8 ? :O

Answer 6

gravity?

Answer 7

u had

3/G = m^2/3^2
from there.. how did you get

8/G = m^2 ?

Answer 8

I have no idea I was working from the book I have no idea how to do it

Answer 9

u don't know how to solve for m ? from that equation? :-/ that's basic algebra girl!

try it!

Answer 10

I dont understand physics at all and I was sick so I didnt get the lesson taught to me and none of my friends get it either. So if you could just help me out that would be great.

Answer 11

so u basically have no clue how to even start solving this problem? huh..

ok.. do you know what the universal law of gravitation is? composed by Newton?

Answer 12

Every point mass in the universe attracts every other point mass with a force that is directly proportional to the product of their masses.

Answer 13

and? there is something else

Answer 14

Thats all it says about it in my book...

Answer 15

are u sure? it says nothing about the distance? at all?

Answer 16

Nothing at all

Answer 17

dang.. maybe they have mentioned it in another part or something .. anyhoo.. its inversely proportional to distance square..

that makes sense right? as the objects go faaaar away, the force between them goes down too.. !

Answer 18

I keep getting 6*10^4

Answer 19

no.. that's way too high..
and first of all.. i read the question wrong to being with.. gravitational force is asked :D

so u have your m1 and m2 which are equal.. you have your d .. and you have your G

F = Gm1m2/d^2.. just plug in and see what you end up with?

Answer 20

G is 2 and M is 3?

Answer 21

no.. d = distance.. G = universal gravitational constant.. i think you need to spend sometime with your textbook.. don't just try to get an answer for a problem!!..

Answer 22

Well then how does the 2 and 3 get plugged in if M1 and M2 are equal

Answer 23

m1 and m2 are the masses.. and read the question.. what are the masses ?

Answer 24

So d is 3....

Answer 25

So F = G*2*2/3^2

Answer 26

so the answer wouldve been A