Q. Two point masses having mass m and 4m placed at distance r. The gravitational potential at a point, where gravitational field intensity zero is
1 .   - 9 G M r 2 .   - 2 G M 3 r 3 .   - 3 G M r 4 .   - 6 G M 5 r

 

see this image.you will get your answer.

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Two bodies of masses m and 4m are placed at a distance r. The gravitational potential at a point on the line joining them where the gravitational field is zero is
  • -9
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