Two bodies of masses

Question:

Two bodies of masses $\mathrm{m}$ and $4 \mathrm{~m}$ are placed at a distance $\mathrm{r}$. The gravitational potential at a point on the line joining them where the gravitational field is zero is :-

  1. $-\frac{6 \mathrm{Gm}}{\mathrm{r}}$

  2. $-\frac{9 \mathrm{Gm}}{\mathrm{r}}$

  3. zero

  4. $-\frac{4 \mathrm{Gm}}{\mathrm{r}}$


Correct Option: , 2

Solution:

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