Answer
The thrust of the engine is $~~8.0\times 10^4~N$
Work Step by Step
We can use Newton's Second Law to find the thrust $F$ of the engine:
$F = ma$
$F = (4.0\times 10^4~kg)(2.0~m/s^2)$
$F = 8.0\times 10^4~N$
The thrust of the engine is $~~8.0\times 10^4~N$
