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NEET 2013 Physics question

PhysicsGravitationNEET 2013

Infinite number of bodies, each of mass 2 kg are situated on -axis at distances 1 m, 2 m, 4 m, 8 m, , respectively, from the origin. The resulting gravitational potential due to this system at the origin will be -

Answer: (4)

Solution

Gravitational potential is a scalar, so the contributions add algebraically: . The bracket is an

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Question ID VK-091305