1. Forward motion (tangential velocity): This is the motion of the object moving forward in a straight line, like a ball thrown horizontally.

2. Gravitational attraction: This is the force pulling the object towards the center of the larger body it's orbiting, like the Earth pulling on the Moon.

How it works:

Imagine throwing a ball horizontally. If there were no gravity, the ball would travel in a straight line forever. However, gravity pulls the ball downwards, causing its path to curve. If you throw the ball fast enough, the curve of its path will match the curvature of the Earth, and it will fall around the Earth instead of crashing into it. This is an orbit.

In summary:

* The forward motion keeps the object moving away from the center of the orbit.

* Gravity pulls the object towards the center of the orbit.

The balance between these two forces creates a stable orbit.