Answer
5.24 $\times$ $10^{5}$ J
Work Step by Step
$\Delta$h = 2830sin(14.6$^{\circ}$)
$\approx$ 713.36 m
$E_{GP}$ = mg$\Delta$h
= 75(9.8)(713.36)
$\approx$ 5.24 $\times$ $10^{5}$ J
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