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JEE Main Physics question

PhysicsGravitationJEE Main

Imagine a new planet having the same density as that of the earth but it is 3 times bigger in size. If the acceleration due to gravity on the surface of earth is and that on the new planet is , then what is the value of ?

Answer: 3

Solution

For a uniform-density sphere, , so for the same density , . Hence .

Question ID VK-154537