8. Centripetal Forces & Gravitation

In the context of Newton's Law of Gravity, which of the following best describes the force between two point masses $m_1$ and $m_2$ separated by a distance $r$?

In the context of Newton's Law of Gravity, which two forces are balanced when an object is in gravitational equilibrium near a planet's surface?

In the equation for the gravitational force between two objects, which of the following correctly expresses the magnitude of the force?

According to Newton's Law of Gravity, the two factors that determine the gravitational attraction between two objects are their masses ($m$) and what other quantity?

According to Newton's Law of Gravity, which two forces primarily determine the orbit of a planet around the Sun?

In the context of Newton's Law of Gravity, which of the following best describes the three factors that determine the gravitational force between two objects?

According to Newton's Law of Gravity, Earth's gravity acts upon objects with a steady force that is proportional to which of the following quantities?

Which of the following best describes the effect of gravity on objects at the surface of $Earth$?

According to Newton's Law of Gravity, which of the following factors primarily determines the gravitational force between two objects ($F=G\frac{m_1{m}_2}{r^2}$)?

Which of the following best describes how $\text{Newton's Law of Gravity}$ relates to the cause of earthquakes?

According to Newton's Law of Gravity, in what direction does the gravitational force $F=\frac{\mathrm{G\; m\_1\; m\_2}}{r^2}$ act on a planet due to the Sun?

Which description best explains why there are two high tides and two low tides each day on Earth according to Newton's Law of Gravity ($F=\frac{\mathrm{Gm\_1m\_2}}{r^2}$)?

According to Newton's Law of Gravity, how does increasing the distance between two masses affect the gravitational force between them?

According to Newton's Law of Gravity, which of the following changes could cause an apple hanging from a tree branch to fall to the ground?

According to Newton's law of universal gravitation, what explains the gravitational attraction between Earth and the Moon?