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

https://www.physicsforums.com/attachment.php?attachmentid=40057&stc=1&d=1318764025

2. Relevant equations

F=m[itex]\frac{dv}{dt}[/itex]-v[itex]\frac{dm}{dt}[/itex]

3. The attempt at a solution

It seems part b is trivial. Obviously, the propellsion force is constant. To find F, just subs m=m/2

I am not sure wheather I am right.

https://www.physicsforums.com/attachment.php?attachmentid=40058&stc=1&d=1318764025

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# Motion with changing mass

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