최대 1 분 소요

# 질문

## 내용

A circular steel rod of length $L$ and diameter $d$ hangs in a mine shaft and holds an ore bucket of weight $W$ at its lower end.

(a) Obtain a formula for the maximum stress $\sigma_{max}$ in the rod, taking into account the weight of the rod itself.

(b) Calculate the maximum stress if $L=40m, d=8mm$, and $W=1.5kN$.

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