Answer
$m = 2717kg$
Work Step by Step
The landing craft has an acceleration of $0.39 m/s^2$ at an upward force of $2200N$
Thus the downward force (weight) is calculated by:
$F_{d} = F_{net} + F_{u}$
Using this formula to find the mass:
$ F_{net} =F_{d} - F_{u}$
$ ma =F_{d} - F_{u}$
$ m =\frac{F_{d} - F_{u}}{a}$
$ m =\frac{3260 - 2200}{0.39}$
$ m = 2717kg$
