Question

Many people mistakenly believe that the astronauts that orbit the Earth are "above gravity". Calculate g for space-shuttle territory, 206 kilometers above the Earth's surface. Earth's mass is 6e24 kg, and its radius is 6.38e6 m (6380 km). Your answer is what percentage of 9.8 m/s^2?

Answer 1

Again g = GM/r^2 where r is (6380+206)e3

Answer 2

Plane A has radius of 6000km and a mass of 6E24kg. The plane B has a radius 1500km and a mass of 1.5E22kg. Which of the planetsame is more likely to have a large metal core?