(Solved): Three tugboats are used to turn a barge in a narrow channel. The tugboat at point A applies a 400lb ...

Three tugboats are used to turn a barge in a narrow channel. The tugboat at point $\mathrm{A}$ applies a $400\mathrm{lb}$. The tugboat at point $\mathrm{B}$ applies a $600\mathrm{lb}$. The tugboat at point $\mathrm{C}$ applies a $300\mathrm{lb}$. Question 8 $0/10pt$ Solve for the moment at point D. Indicate as negative is clockwise, and positive otherwise. The moment at point $D$ is lb-ft.