A car going at $27$ mph $($which is equal to $12\mathrm{.}1$m$/$s$12\mathrm{.}1$m$/$s$)$ comes to a sudden stop, slowing down at $9\mathrm{.}81$ m$/$s$2$m$/$s$2($enough to "throw you forward" at g$-$force of $1$g$1$g$).$

Hint

How far does the car move forward before eventually coming to a stop?

The car moves forward meters.

Suppose that the car was going at twice the speed. How far does the car move forward now before eventually coming to a stop, if the magnitude of acceleration is still the same?

If the car was moving at twice the speed, it now moves forward meters.