# Launch speed

1. Jul 22, 2004

### wilmerena

Does anyone know the formula to find launch speed?

2. Jul 22, 2004

### arildno

Launch in order to do accomplish what?

3. Jul 22, 2004

### wilmerena

im sorry i think i got it.

its of a projectile that rises vertically above the earth to an altitude equal to one earth radius

is it:
square root of: (Universal gravitational constant of earth) x (mass of earth) all divided by Radius of earth?

4. Jul 22, 2004

### faust9

$$v_{orbit}=\sqrt{\frac{Gm}{r}}$$

Where G is universal gravitational constant, m is mass of orbiting body, and r is radius between bodies.

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