Free body diagram (FBD) is a graphical representation of the forces acting on a body of interest in given conditions. FBD helps in solving static and dynamic problems in mechanical engineering. We suggest you to also read this article on degree of freedom in mechanics.
Why We need Free Body Diagram ?
FBD help engineers in product design by providing the following information:
- Visualize forces acting on a body.
- Calculate unknown Forces.
Step-1: Identify and list down all forces acting on a body.
When a man tries to push a wooden block, he works against, wooden block weight and frictional force in between wooden block and floor. Therefore following forces acts on the block.
Step-2: Create Rigid Body line diagram
In this case line diagram for a rectangle block will be a rectangle. It defines the basic shape of the body.
Step-3: Mark the forces acting on Rigid Body on Line Diagram
Free Body Diagram Examples
To sum up, FBD is a very good tool in physics and engineering to visualize and calculate the forces acting on a rigid body.
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