Answer
$\approx 23.6KJ$
Work Step by Step
$E = U + \Delta K$
$= U + (K_f-K_i)$
$=mgh + \frac{1}{2}m(v_f-v_i)$
$=mg(dsin\theta) + \frac{1}{2}m(v_f-v_i)$
$=m(gdsin\theta + \frac{1}{2}(v_f-v_i))$
$=1500(9.8 \times (50 \times sin5^{\circ}) + \frac{1}{2}(40-30))$
$=23550J$
$\approx 23.6KJ$
