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Head on Collisions and Glancing Collisions

Head on Collisions: objects rebound on straight line paths that co-incide with original direction of motion. These collisions can be treated one dimensionally.
Glancing Collisions: (see Figure 6.2)

Figure 6.2: 2-D Glancing collision
$\begin{figure} \begin{center} \leavevmode \epsfysize=3 cm \epsfbox{fig62.eps}\end{center}\end{figure}$

Momentum is still conserved, but we must work in 2 dimensions.

$\displaystyle\Sigma$ $\displaystyle\vec{p}_{i}^{}$ = $\displaystyle\Sigma$ $\displaystyle\vec{p}_{f}^{}$ (10)

or,

$\displaystyle\Sigma$ p_ix = $\displaystyle\Sigma$ p_fx (11)

$\displaystyle\Sigma$ p_iy = $\displaystyle\Sigma$ p_fy. (12)

**Figure 6.2:** 2-D Glancing collision
$\begin{figure} \begin{center} \leavevmode \epsfysize=3 cm \epsfbox{fig62.eps}\end{center}\end{figure}$

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10/9/1997

$\displaystyle\Sigma$ p_ix	=	$\displaystyle\Sigma$ p_fx	(11)
$\displaystyle\Sigma$ p_iy	=	$\displaystyle\Sigma$ p_fy.	(12)