If an astronaut landed on a planet that had the same radius as earth but 4 times its mass, then the astronaut's weight on the planet would be:

4 times

Explanation:

= mass of the earth

= radius of the earth

= acceleration due to gravity on earth

acceleration due to gravity on the earth is given as

= weight of the astronaut on earth

weight of the astronaut on earth is given as

= mass of the planet =

= radius of the planet = R

= acceleration due to gravity on earth

acceleration due to gravity on the planet is given as

= weight of the astronaut on planet

weight of the astronaut on planet is given as

hence the weight of the astronaut on the planet is four times.

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