two masses 9 kg ang 4kg are placed at a distance of 10m from each then the value og potential where gravitational field is zero??

Question

anonymous · Answer

i m not gettin formula for this .

stormfire1 · Answer

The only formula you need is $$Fg = G \frac{m _{1}m _{2}}{r^2}$$

Plug in the masses and solve the equation for r with Fg = 0

anonymous · Answer

i tried this formula but not gettin ans :(

anonymous · Answer

sure thnx...

stormfire1 · Answer

Now that I think about it I'm not sure what's being asked...the last part of the question is vague.  Is that the exact wording?

anonymous · Answer

yea :(

stormfire1 · Answer

I think it's asking at point do the forces between the two objects cancel each other.  That equation would look like this:  $$\frac{m1}{r1^2} = \frac{m2}{(10m-r1)^2}$$

stormfire1 · Answer

Solving for r1 in that equation will give you the point between the two objects where the forces of gravity between them are equal.

anonymous · Answer

one ques 10m what is the value of that m?

stormfire1 · Answer

10 meters :)

anonymous · Answer

ok

anonymous · Answer

ans is not seems rit as i m getting by solving this 900/13=r1^2

stormfire1 · Answer

Your final answer should be 6m btw

anonymous · Answer

u know ans is 
-5G/2

stormfire1 · Answer

If that's their answer then we misunderstood the question...

anonymous · Answer

hey type ur ans here i have to leave byeee thnx

anonymous · Answer

there is something incomplete in ur question wat are u asking for gravitational potential or field?

anonymous · Answer

u have to find gravitational potential where the gravitational field is 0

mani_jha · Answer

the point where gravitational field is zero is x=6. Gravitational potential = 
-G9/6-G4/4=-G(3/2+1)=-5G/2.
The second potential is -G4/4 because with respect to m=4kg, the null point is at x=4.

anonymous · Answer

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solve for x u get x=4 and other=6
later find potential by using relation
-GM/r

remember  that field becaamre zero as o it is a VECTOR