## Which of the following diagrams represents the correct free-body diagram for this situation?

A free body diagram (force diagram,[1] or FBD) is a graphical representation used in physics and engineering to depict the applied forces, moments, and subsequent reactions on a body in a given state. They show a body or a group of bodies, as well as all the applied forces, moments, and reactions that act on the body (ies). The body can be made up of several internal members (such as a truss) or it can be small and compact (such as a beam). To solve complex problems, a series of free bodies and other diagrams may be needed.
In several types of mechanics problems, free body diagrams are used to visualize the forces and moments applied to a body and to quantify the resulting reactions. These diagrams are widely used in most engineering disciplines, from Biomechanics to Structural Engineering, to assess the loading of individual structural components and to quantify internal forces within the structure. [two] [three]
Learning to draw a free body diagram is an essential step in understanding such topics of physics, such as statics, dynamics, and other aspects of classical mechanics, in the educational setting.

## Free-body diagram questions and answers pdf

The careful drawing of a free-body diagram is the first step in explaining and examining most phenomena in physics. Throughout this chapter, free-body diagrams have been used as examples. Keep in mind that a free-body diagram can only show the external forces acting on the subject body. We may use Newton’s first law if the body is in equilibrium (balanced forces; that is, (F net = 0)) or Newton’s second law if the body is accelerating (unbalanced force; that is, (F net neq 0)) after we’ve drawn an appropriate free-body diagram.
Notice that we do not explicitly include acceleration in the free-body diagram if it exists; however, indicating acceleration beyond the free-body diagram can be useful. It can be labeled in a different color to distinguish it from the free-body diagram.
Let’s use the problem-solving technique to draw a sled’s free-body diagram. Figure (PageIndex1a) shows a sled being pulled at a 30° angle by force (vecP). Part (b) depicts a free-body diagram for this case, as outlined in the problem-solving strategy’s steps 1 and 2. Following phase 3, we show all forces in terms of their x- and y-components in section (c).

### Electricity

The careful drawing of a free-body diagram is the first step in explaining and examining most phenomena in physics. Throughout this chapter, free-body diagrams have been used as examples. Keep in mind that a free-body diagram can only show the external forces acting on the subject body. We may use Newton’s first law if the body is in equilibrium (balanced forces; that is, [latex] F textnet=0 [/latex]) or Newton’s second law if the body is accelerating (unbalanced force; that is, [latex] F textnetne 0 [/latex]) after we’ve drawn an appropriate free-body diagram.
Notice that we do not explicitly include acceleration in the free-body diagram if it exists; however, indicating acceleration beyond the free-body diagram can be useful. It can be labeled in a different color to distinguish it from the free-body diagram.

### Free body diagram problems and solutions

The careful drawing of a free-body diagram is the first step in explaining and examining most phenomena in physics. Throughout this chapter, free-body diagrams have been used as examples. Keep in mind that a free-body diagram can only show the external forces acting on the subject body. We can use Newton’s first law if the body is in equilibrium (balanced forces; that is, Fnet=0Fnet=0) or Newton’s second law if the body is accelerating (unbalanced force; that is, Fnet0Fnet0) after we’ve drawn an appropriate free-body diagram.
Notice that we do not explicitly include acceleration in the free-body diagram if it exists; however, indicating acceleration beyond the free-body diagram can be useful. It can be labeled in a different color to distinguish it from the free-body diagram.
Let’s use the problem-solving technique to draw a sled’s free-body diagram. Figure 5.31(a) shows a sled being pulled by force P at a 30°30° angle. Part (b) depicts a free-body diagram for this case, as outlined in the problem-solving strategy’s steps 1 and 2. Following phase 3, we show all forces in terms of their x- and y-components in section (c).