The version of rocket science I'm explaining to you is very simplified.

Basically, there is an escape velocity you need to overcome the Earth's gravitational field. That's why, if you throw an object into the air, it comes back down. Due to the force of gravity acting on it being greater than the force you provide for it to go up. The official figure is 11.2km/sec. That's 25,200 miles per hour. If your speed is greater than this then you're able to escape the earth's gravitational field. This is also why a lot of the rocket launch videos are slowed down. I've seen a 265mph Bugatti Veyron, and the cameras can barely keep up with it. Imagine something going 25000 miles an hour faster than that.

The formula for orbital speed is:

http://upload.wikimedia.org/math/e/2/6/e2684137b47dd6221fbcf1289069e637.png

If V is any greater than that, then the satellite goes off at a tangent. If V is less, it comes back down to Earth.

Well.... hope you enjoyed my Rocket Science lecture.

Basically, there is an escape velocity you need to overcome the Earth's gravitational field. That's why, if you throw an object into the air, it comes back down. Due to the force of gravity acting on it being greater than the force you provide for it to go up. The official figure is 11.2km/sec. That's 25,200 miles per hour. If your speed is greater than this then you're able to escape the earth's gravitational field. This is also why a lot of the rocket launch videos are slowed down. I've seen a 265mph Bugatti Veyron, and the cameras can barely keep up with it. Imagine something going 25000 miles an hour faster than that.

The formula for orbital speed is:

http://upload.wikimedia.org/math/e/2/6/e2684137b47dd6221fbcf1289069e637.png

If V is any greater than that, then the satellite goes off at a tangent. If V is less, it comes back down to Earth.

Well.... hope you enjoyed my Rocket Science lecture.