As an example, consider the case of a board of length L and negligible mass. Take the x axis to be the horizontal axis along the

Question

As an example, consider the case of a board of length L and negligible mass. Take the x axis to be the horizontal axis along the board and the y axis to be the vertical axis perpendicular to the board. A mass of weight W is strapped to the board a distance x from the left-hand end. (Figure 1) This is a static equilibrium problem, and a good first step is to write down the equation for the sum of all the forces in the y direction since the only nonzero forces of ΣF = 0 that exist are in the y direction. 
What is ΣFy? Your equation for the net force in the y direction on the board should contain all the forces acting vertically on the board. 
Express your answer in terms of the weight W and the tensions in the two vertical ropes at the left and right ends Tl and TR . Recall that positive forces point upward.  
ΣFy=0=

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