a race track is 500 meters long.car A moves with a constant velocity of 40m/s, approaching the start line.when car A reaches the starting line, car b, who is waiting stationary at the starting line, accelerates at a rate of 10m/s^2. which car will finish first?

Answer 1

Car A: d = r*t, t = d/r = 500/40 = 12.5 s.

Car B: d = 0.5a*t^2, t^2 = d/0.5a = 500/5 = 100, t = 10 s.