- #1
Hashiramasenju
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Homework Statement
So there are two planets A and B whose centres are 6r apart. A and B has the same mass M and radius R. What is the minimum velocity(from the surface of B) of the rocket required to launch it from B so that it reaches A ?
Homework Equations
F=GmM/R^2
The Attempt at a Solution
So what i thought was at the mid point between the planets the rocket must have zero velocity so
acceleration=GM/x^2 -GM/(6r-x)^2
and as a=v dv/dx
then i integrated both sides with limits of 0&Vm(launch speed) for dv
and 3R&5R for dx
Is this right ?