ELEMENTS OF PHYSICS I
Physics 221

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CHAPTER 9
Bodies in equilibrium; elasticity and fracture

NEW CONCEPTS

FORMULAS

Equilibrium:

\begin{displaymath}\sum\vec F = \vec 0\quad \sum\tau = 0\end{displaymath}

Hooke's law:

\begin{displaymath}F = k\, \Delta L\end{displaymath}


\begin{displaymath}{\rm Elastic~modulus} = {{\rm stress}\over {\rm strain}}\end{displaymath}

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