physics

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I am to measure the deflection by contructing a post and lintel system using the dowels I have (with different diameters, which will be my variables). This is a system to measure the deflection under a load. I want to create a chart to present my results, but I don't know what I need to measure or what to look for.
Please help me. Thanks!

Measure deflection at some point on the horizonal beam.

Plot deflection vs diameter

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