# Satellites in orbit

1. Mar 21, 2006

### nick727kcin

i solved it. thanks to all who responded

Last edited: Mar 21, 2006
2. Mar 21, 2006

### nick727kcin

shouldnt the answer be the same as the one in part a?

3. Mar 21, 2006

### Dr.Brain

Apply the energy conservation.

4. Mar 21, 2006

### andrevdh

No, its speed needs to be increased at point 1 so that it matches the speed if it were in the elliptical orbit. This will then transfer it into the new elliptical orbit, or stated differently its energy need to be increased (kinetic) so that it matches the energy of the elliptical orbit at that point (the potential energy is the same at that point for both orbits).

Last edited: Mar 21, 2006
5. Mar 21, 2006

### Galileo

Can you show how you got that answer?

6. Mar 21, 2006

### nick727kcin

thanks for responding guys, and i got that answer by using this formula:

v= (sq. root) GM/(Re+h)

part a is definately right, though

7. Mar 21, 2006

### Hootenanny

Staff Emeritus
That looks good to me.