Answer
The correct answer is:
C. $0.54~MJ$
Work Step by Step
The total work done is equal to the apparent increase in gravitational potential energy:
$U_g = mgh$
$U_g = mgd~sin~\theta$
$U_g = mgvt~sin~\theta$
$U_g = (90~kg)(10~m/s^2)(2~m/s)(600~s)~sin~30^{\circ}$
$U_g = 5.4\times 10^5~J$
$U_g = 0.54~MJ$
The correct answer is:
C. $0.54~MJ$
