An astronaut on a strange planet finds that the acceleration due to gravity is twice that on the surface of Earth. Which of the following could explain this?

Question

Both the mass and radius of the planet are twice that of Earth.

The mass of the planet is half that of Earth, but the radius is the same as that of Earth.

Both the mass and radius of the planet are half that of Earth.

The radius of the planet is half that of Earth, but the mass is the same as that of Earth.

Solution

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