What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth's radius?
A)580 N
B)290 N
C)1160 N
D)118 N
E)1200 N

Question

Quizplus · Accepted Answer

The gravitational force is proportional to the mass of the planet and inversely proportional to the square of the radius. Doubling the mass and radius results in a gravitational force of 1/2 that on Earth. The astronaut's weight on Earth is 580 N, so on the new planet, it would be 290 N.

What Would Be the Weight of a 59