1. The problem statement, all variables and given/known data Kindly see the attachment. 2. Relevant equations 3. The attempt at a solution As with all such questions, its in setting everything up that I'm having some trouble. I know that F = mdv/dt + vdm/dt. And also that F = R - m(t)g, but R = M0g. From here though I don't know how to proceed to obtain the differential equation to solve for v. Any hints? Thank you very much.