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hodgepodge
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Homework Statement
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
Homework Equations
i think Vesc.=(2GM)/r
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