ELEMENTS OF PHYSICS I
Physics 221

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CHAPTER 2
Describing motion: kinematics in one dimension

NEW CONCEPTS

FORMULAS

Average velocity:

\begin{displaymath}\overline v = {\Delta x\over \Delta t}\end{displaymath}

Instantaneous velocity:

\begin{displaymath}v = {dx\over dt} = \lim_{\Delta t\to 0} {\Delta x\over \Delta t}\end{displaymath}

Average acceleration:

\begin{displaymath}\overline a = {\Delta v\over \Delta t}\end{displaymath}

Instantaneous acceleration:

\begin{displaymath}a = {dv\over dt} = \lim_{\Delta t\to 0} {\Delta v\over \Delta t}\end{displaymath}

Constant acceleration:

v = v0 + at


\begin{displaymath}x = x_0 + v_0t + {1\over 2} at^2\end{displaymath}


v2 = v02 + 2a(x-x0)


\begin{displaymath}\overline v = {v+v_0\over 2}\end{displaymath}

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