how fast does the rocket have go the to get out of our atmosphere

Question: how fast does the rocket have go the to get out of our atmosphere
- Keywords:
  atmosphere,
  rocket,
  speed
Asked by woodenbridge984 to Rochelle, Julia, Jon F, Beth, Adrian on 18 Jan 2016.
- Jon Farrow answered on 18 Jan 2016:
  
  The final speed of a rocket destined for the ISS has to be 7.6 km/s (about 27500 km/h) in order to dock with the ISS, which is travelling that fast.
  
  In astrophysics, the distance you want to orbit from a planet and your speed are linked. It’s called orbital speed. To calculate it, all you need to know is the mass of the thing you’re orbiting and the distance you want to orbit at.

Question: how fast does the rocket have go the to get out of our atmosphere