What would be the earth if its mass was twice as large and its radius was half of what it is now?
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- Gravitational force is proportional to the mass of the earth and inversely proportional to the square of the distance between the centre of object and the centre of earth.
- So if mass of Earth becomes double the value of g should also double.
- If radius becomes half the value of g should become 4 times of its original value. (Approximately, considering the radius of earth is much bigger than the the distance of object from the surface of earth)
- If both these things happen together then the value of g should become 8 times of its current value.
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