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

Q: 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

(a) Zero

(b) -4Gm/r

(c) -6Gm/r

(d) -9Gm/r

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Ans: (d)