Solve Shear Force & Moment Equation Homework

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The discussion focuses on a homework problem involving shear force and moment equations. A key point of confusion is why the moment equation references both vertical (Ay) and horizontal (Ax) components while only considering a 3 kip force in one direction. It is clarified that the force does have x and y components, calculated as Fx = 3 sin 30 and Fy = 3 cos 30. However, when summing moments about point B, using the resultant force F simplifies the calculation compared to summing individual component moments. Understanding the approach to calculating moments is crucial for solving the problem effectively.
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Homework Statement


The problem and the solution are in attached.


Homework Equations





The Attempt at a Solution



What I'm confused about is the moment equation. Why does the equation reference both Ay and Ax, but it only considers the 3 kip force in one direction. Why doesn't it have an x-component, and a y-component?
 

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tj1989 said:

Homework Statement


The problem and the solution are in attached.


Homework Equations





The Attempt at a Solution



What I'm confused about is the moment equation. Why does the equation reference both Ay and Ax, but it only considers the 3 kip force in one direction. Why doesn't it have an x-component, and a y-component?
It does, Fx = 3 sin30 and Fy = 3 cos 30. When summing moments about B, however, it is easier to use the resultant force F in calculating the moment, rather than use the sum of its component moments to calculate the moment.
 

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