OmniNewton said:Homework Statement
How come for the following image when I assume block B slips up, block A does not move. The free body diagram at block B does not have a normal from the ground. This is a static friction problem.
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Homework Equations
No relevant equations all theory[/B]
The Attempt at a Solution
This should be the Free body diagram but why does B have no normal from the ground when this assumption is made?
Excellent, thank you that is what I thought. I did the question originally assuming the normal and the system was statically indeterminate I was unsure how to solve until I was told this FBD did not contain a normal but I was unsure as to whyrpthomps said:
Is that from checking with the actual numbers? With some combinations of weights etc., the three blocks would slide horizontally, no lifting.rpthomps said:
haruspex said:
Despite the way the blocks are drawn, block A is much lighter than block B. If it's light enough it will slide instead of B rising. It's easy to visualise - the three blocks slide as if one unit.rpthomps said:
haruspex said:
The actual problem statement appears to be in post #4.rpthomps said:
A free body diagram is a visual representation of the forces acting on an object. It shows the magnitude and direction of these forces, and is used to analyze the motion of the object.
Free body diagram logic is important because it allows scientists to understand the forces that are acting on an object and how they affect its motion. This is crucial in areas such as physics, engineering, and biomechanics.
To create a free body diagram, you first need to identify all the forces acting on the object. These can include gravitational force, normal force, frictional force, and applied forces. Then, draw a simple sketch of the object and label each force with its magnitude and direction.
The purpose of using free body diagram logic is to simplify complex systems and understand the relationship between forces and motion. It allows scientists to make predictions and analyze the behavior of objects under different conditions.
Yes, free body diagram logic can be used for both rigid and non-rigid bodies. However, the analysis may be more complex for non-rigid bodies due to the additional consideration of deformation and internal forces.