(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

when a spacecraft escapes from the earth, it still has to escape from the sun, in order to leave the solar system. at what velocity should a spacecraft be launched if it is 6.4x10^6 meters from earth's centre and 1.5x10^11 meteres from the sun (M=2x10^30 kg) if it is to escape the solar system.

G=6.672x10^-11

2. Relevant equations

i think Vesc.=(2GM)/r

3. The attempt at a solution

i was thinking to plug in the sun's mass for M, but for r, i was thinking to put in 6.4x10^6 + 1.5x10^11 for r, am i even using the right formula? i'm pretty sure that i am, i just am confused over the use of 2 distances

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Escape velocity

**Physics Forums | Science Articles, Homework Help, Discussion**