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JEE Main Physics question

PhysicsGravitationJEE Main

Two bodies of masses and are initially at rest at infinite separation. They are then allowed to move towards each other under mutual gravitational attraction. Their relative velocity of approach at a separation distance between them is [BHU 1994, RPET 1999, AIIMS 2008]

Answer: (B)

Solution

By momentum conservation, . By energy conservation, the gravitational PE released equals the total KE gained: . Solving these

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Question ID VK-154749