Question 1010554
w, weight
d, distance
k, variation constant


{{{w=k/d^2}}}, how the weight varies


Assigned some values:
{{{system(d=8000,w=90)}}}
Find k, first.
{{{w*d^2=k}}}
{{{k=90*8000^2}}}
{{{k=72*10^7}}}
{{{k=7.2*10^8}}}


More specific model is  {{{highlight(w=(7.2*10^8)/d^2)}}}.