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3 cards from this section. Quick, good the night before a test.
Define shear force.
Think about forces that cause layers to slide.
What is a free body diagram?
Consider what it means to isolate a body in analysis.
What is the primary effect of vertical loads on girders?
Consider how weight acts on a beam.
Free body diagrams are useful for:
Think of them as tools for simplification.
Given a beam with a length of 5m and a uniform load of 20 kN, calculate the shear forces at 1m, 2m, 3m, and 4m from the left support.
Determine how much weight each section bears based on its support and position.
Evaluate the consequences of incorrectly assuming a cantilever beam is simply supported when analyzing shear and moment.
Think of scenarios where incorrect assumptions could fail sudden loads.
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