Question

The two factors that combine to keep Earth and the moon in their orbits are

a. gravity and orbital speed.

b. orbital speed and mass.

c. mass and inertia.

d. gravity and inertia.

Answer 1

D. Gravity and inertia

Answer 2

Answer:

Gravity & Inertia are the two factors that combine to keep Earth and the moon in their orbits

Explanation:

Gravity is an unseen force that pulls any objects toward each other. This force keeps all the planet in their orbit which moves around the sun. On the other hand inertia helps planet in resisting their changes in motion. Both gravitational force and inertia works together to keep planets in their orbits.

In a space there is a tug of war where one object wants to go forward and other wants to pull it but both forces of inertia and gravity are balanced to make a solar system.