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ZachDom4784
29.12.2020 •
Mathematics
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Ответ:
5 units.
Step-by-step explanation:
Given the coordinates, 5 units is the answer.
Ответ:
dwork = F(h)*dh
dwork = weight(h)*dh
weight(t) = 44 - 0.2t
but t = h/v
weight(h) = 44 - 0.2(h/v) --->[44 - 8] = 36 lbs at top
work = ∫ weight(h) * dh
work = ∫[44 - 0.2(h/v)] dh <0 to 80>ft
work = ∫[44 - 0.1h] dh <0 to 80>ft
work = 44h - 0.1*0.5*h^2 <0 to 80>ft
work = 44*80 - (0.1*0.5*80^2) = 3200 ft-lbs