Putting an item into orbit. Help

1. Dec 3, 2008

Squeek

1. The problem statement, all variables and given/known data
No idea how to do this honestly, but here it is. Hopefully someone can just work this out and I can learn from that. Calculate the velocity needed to place a 14.5kg item (its a turkey but whatever lol) into orbit around the Earth at an elevation of 100km. The radius of the Earth is 6500km. Like I said I'm not sure to how to do this and I need to know.

2. Relevant equations
I was given formulas ( These might have nothing to do with it, beware) Fc=mu2/r
ac=4pi2rf2

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Dec 3, 2008

3. Dec 3, 2008

Squeek

The point is I don't know how to do it, I have no work. Obviously I'm not going to get any help so someone just delete this...

4. Dec 3, 2008

LowlyPion

In general you know that there will need to be a conservation of energy to accomplish this don't you?

So doesn't the sum of the PE at surface + KE initial = PE at orbit + KE of object in orbit?