The speed a rocket needs to go past gravitational force is called escape velocity. It's the minimum speed an object needs to escape the gravitational pull of a planet or other celestial body without any further propulsion.

Here's the breakdown:

* Earth's escape velocity: About 11.2 kilometers per second (7 miles per second).

* Escape velocity depends on:

* The mass of the celestial body: The more massive the body, the stronger its gravitational pull, and the higher the escape velocity.

* The distance from the center of the celestial body: The closer you are to the center, the stronger the gravitational pull, and the higher the escape velocity.

Important note: Escape velocity is the speed needed to *completely* escape the gravitational pull, meaning the object would never fall back down. If an object reaches escape velocity but doesn't continue accelerating, it will still slow down as it travels further away from the celestial body, but it will never come to a complete stop and fall back.

Think of it like throwing a ball straight up:

* Not enough speed: The ball slows down, stops, and falls back down.

* Enough speed (escape velocity): The ball slows down, but never stops completely, and continues traveling upward forever (at least until it's affected by the gravity of another celestial body).