Planets would crash into the sun if it weren't for
A)their tangential velocities.
B)their vast distances from the sun.
C)the inverse-square law.
D)their relatively small masses.
E)the fact that they are beyond the main gravitation of the sun.

Question

Quizplus · Accepted Answer

Planets have tangential velocities that move them sideways as they orbit around the sun, balancing the force of gravity pulling them toward the sun. Without their tangential velocities, they would be pulled directly into the sun.

Planets Would Crash into the Sun If It Weren't for