8. Centripetal Forces & Gravitation

An object of mass $m$ is launched from the surface of a planet of mass $m$ and radius $r$. What is the minimum speed required for the object to escape the planet's gravitational field (the escape velocity)?

Three identical satellites $A$, $B$, and $C$ are launched into circular orbits around Earth at different altitudes: $A$ is closest to Earth, $B$ is at a medium altitude, and $C$ is farthest from Earth. Rank the magnitude of the net gravitational force acting on each satellite due to Earth from greatest to least.

According to Newton's Law of Gravity, which two factors determine the magnitude of the gravitational force between two objects?

If Halley's Comet were to collide with Neptune, how would this most likely affect Neptune's orbit around the $\mathrm{Sun}$?

Which of the following factors is primarily responsible for the seasonal changes on $\mathrm{Earth}$?

Which of the following best describes the effect of the Moon's gravity on $\mathrm{Earth}$?

Which statement correctly describes the factors affecting the gravitational force between two objects according to Newton's Law of Gravity? $F=\frac{G{m}_1{m}_2}{r^2}$

Why did Newton believe there was a force acting on the Moon?

According to Newton's Law of Gravity, what type of force acts between the Earth and the Moon? $F=G\frac{m\mathrm{\_E}m\mathrm{\_M}}{r^2}$

Which of the following is the cause for the different seasons on $Earth$?

Which force is responsible for keeping $\mathrm{Earth}$ in orbit around the $\mathrm{Sun}$?

According to Newton's Law of Gravity, which of the following correctly expresses the gravitational force $F$ between two masses $m_1$ and $m_2$ separated by a distance $r$?

When an object moves in a gravitational field, which of the following statements about the gravitational force acting on it is correct?