Answer
$t=30$s
$s=792$m
Work Step by Step
We solve for time as follows:
$v=v_1+a_ct$
$120=70+6000t$
$t=8.33\times10^{-3}$ hr = $30$ s
Next, we solve for distance:
$v^2=v_1^2+2a_c(s-s_1)$
$120^2=70^2+2(6000)(s-0)$
$s=0.792$ km $= 792$ m
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