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JEE Main2011PhysicsGravitationActual

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

Options

  1. A- 4 Gm r
  2. B- 6 Gm r
  3. C- 9 Gm r
  4. Dzero

Correct answer

C. - 9 Gm r

Step-by-step solution

Position of the null point from mass m , x = r 1+ 4 ~m ~m = r 3 V=-G m ( 3 r + 12 2 r )=-9 G m r

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