If you get it then you can answer your own question!!!!!
Assuming that you found a roller coaster with a true vertical incline and a true vertical decline (and that after the initial acceleration away from the station) you would experience a deceleration of 1g going up and an acceleration of 1g going down (assumes no friction or wind resistance).
slowing down or speeding up at the rate of 32.2 feet/sec every second
Also ignores the bit going into the climb and out of the dive where we enter the realm of centripetal acceleration which is determined by the speed and turn radius.