Question

What relationship between gravity and inertia (speed) is

necessary for planets or satellites to remain in orbit?

Answer 1

Like all objects with mass, planets have a tendency to resist changes to their direction and speed of movement. This tendency to resist change is called inertia, and its interaction with the gravitational attraction of the sun is what keeps the planets of the solar system, including Earth, in stable orbits.

Step-by-step explanation: