- #1

fonseh

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## Homework Statement

In this question , I don't understand why the KBC is 4EI / L ...

## Homework Equations

## The Attempt at a Solution

I was told that for the far end pinned or roller supported , the K = 3EI / L , so shouldn't the KBC = 3EI / L.. Is the author wrong ?

In the 3rd photo , we can see that for far end pinned supported , k = 3EI / L ,

**not 4EI / L**

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