8. Centripetal Forces & Gravitation

In the context of satellite motion around $\mathrm{Earth}$, which of the following best represents the distance of a satellite from the center of the $\mathrm{Earth}$?

A space shuttle orbits at an altitude of $300 \mathrm{km}$ above the surface of the Earth. Which of the following best explains why the shuttle remains in orbit rather than falling straight down to Earth?

Which of the following correctly describes the relationship between the orbital speed $v$ of a satellite in a circular orbit of radius $r$ around the Earth (mass $M$) and the gravitational constant $G$?

Which of the following best explains how engineers keep satellites in orbit around the $Earth$?

In the context of satellite motion and reference frames, which statement best describes the motion of the $\mathrm{Sun}$?