Asked by Ashley

If is given that B= Rate of burn of fuel mass

So can we right B=dm/dt or -dm/dt, which of these is accurate?
Answered by bobpursley
if m is the mass of the rocket, the -dm/dt is more useful.
Answered by Ashley
Here, m is the mass of the fuel remaining
Answered by bobpursley
Mass of system=massofrocket + massoffuel
dMassofSystem/dt=dm/dt and it is negataive. I assume the mass of the rocket does not change.
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