Question

Problem 2.62 < 7of19 How far beyond its starting point does the automobile overtake the truck? Constants At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.80 m/sAt the same instant, a truck, traveling with a constant speed of 14.5 m/s overtakes and passes the automobile. ΑΣφ d- SubmitP Previous Answers Request Answer Incorrect; Try Again; 5 attempts remaining Part B How fast is the automobile traveling when it overtakes the truck? m/s

Answer 1

Relative initial velocity u = 14.5 m/s Relative acceleration, a = -2.8 m/s^2 Using s = ut + 1/2 at^2 = > o = 14.5t - 1/2 times 2.8 t^2 = > t = 10.36 s Therefore distance, d = 14.5 times 10.36 = 150.2 m V = u + at = 0 + 2.8 times 10.36 = 29 m/s