1. Gravity & Orbits
An abridged version…

5. An astronaut who weighs 800N on Earth travels to a distant planet whose mass is three times that of Earth and has twice the radius. What is the astronaut’s weight on the new planet?

6. An astronaut who weighs 900N on Earth travels to a planet that has twice the radius of Earth, and finds that she weighs 1500N. What is the mass of the planet in terms of the mass of the Earth?

7. By what factor would we need to reduce the Earth’s radius if we want to increase your weight to 3 times what is presently is?