Ur drivin down the road ur fishin box falls out it decelerates at 3m/s2 and skids 24 meters how fast wer u goi?

you are driving down the road and hit a bump which causes your fishing tackle box to bounce out of the bed of your pickup. the box decelerates at a rate of 3 m/s2 and skids 24 meters before coming to a stop. How fast were you traveling when the box fell out?