\magnification=\magstep2


$$
{t \quad} = \quad {{v_t}\over{R}}  \quad \quad \left({\rm {rad}\over{sec}} \right) 
$$

$$
{R \quad} = \quad {{v_t}\over{t}}  
$$

$$
{R \quad} = \quad {{{\rm average\  corrected\ } v_r}\over{{{\rm average\ } t}}}  
$$

\bye