Kian drives 48 miles per hour and speeds up to merge onto the highway. he gradually accelerates at a rate of 7 miles per hour for several seconds. you can use the formula s=ut+1/2at^2 to calculate the distance, s, an object travels in t seconds. in this formula u represents the initial velocity, and a represents the constant acceleration. substitute the initial velocity and constant acceleration into the formula to write an equation to represent the distance kian travels.