Answer
$-57MJ$
Work Step by Step
The work done by the non-conservative forces can be determined as
$W_{nc}=E_f-E_i$
$\implies W_{nc}=\frac{1}{2}mv_f^2-\frac{1}{2}mv_i^2$
We plug in the known values to obtain:
$W_{nc}=0-\frac{1}{2}(17,000)(82)$
$W_{nc}=-5.7\times 10^7J=-57MJ$
