\magnification=\magstep2


$$
\eqalign{
F \quad &= \quad {{ G M_E M_{\rm Fred} } \over { (R_E + 200{\rm \ km})^2 } } \cr
        \cr
        &=  \quad\quad 647 \thinspace N  \cr
}
$$

$$
\vec{F} \quad = \quad m \vec{a} 
$$



\bye
