See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Let mass of the earth is Me and mass of object is m. Force on object at e 3 GM m A r R       towards centre. Force on object along the tunnel 2 2 e 3 R r GM m 4 r r R        Acceleration of object along the tunnel 2 2 e 3 GM R r 4 R         A 2 e R  r