- #1
Berkshire
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Homework Statement
The escape speed from a very small asteroid is only 28 m/s. If you throw a rock away from the asteroid at a speed of 39 m/s, what will be its final speed?
Vesc= 28m/s
Vi= 39 m/s
Homework Equations
Ks,f + Ke,f + Uf = Ks,i + Ke,i + Ui +W
Vi=sqrt(2GM/r)
The Attempt at a Solution
Well I know the first equation gets simplfied to
0=.5mv^2 + (-GM/r)
Vi=sqrt(2GM/r)
But I don't have radius or mass of my asteroid and I don't have any equations that incorporate the final velocity...
But I can't figure out how to