Question 934009
{{{d[1]=v[0]*t+d[0]=10t+75}}}
{{{d[2]=(1/2)at^2=(1/2)(2)t^2=t^2}}}
Find {{{t}}} when {{{d[1]=d[2]}}}
{{{t^2=10t+75}}}
{{{t^2-10t-75=0}}}
{{{(t-15)(t+5)=0}}}
Only the positive solution for {{{t}}} makes sense here.
{{{t-15=0}}}
{{{t=15}}}sec