A roller coaster has a vertical loop with radius $29\mathrm{.}5$ m$.$ What is the minimum speed of the roller coaster car can have$$at the top of the loop if the passengers do not lose contact with the seats?

$10\mathrm{.}0$ m$/$s

$14\mathrm{.}0$ m$/$s

$17\mathrm{.}0$ m$/$s

$19\mathrm{.}0$ m$/$s