In a bicycle race on a straight road, the leader is 72.0 m from the finish line and continues to travel to the finish line with a constant speed of 12 m/s. When the leader is 72.0 m from the finish line, the second-place rider is 5.0 m behind him and traveling with a speed of 11.0 m/s when she decides to accelerate, keeping a constant acceleration for the rest of the race. The two riders end up crossing the finish line at exactly the same time. (a) Calculate the value of the second rider? s constant acceleration that allows her to cross the finish line at exactly the same time as the first rider. m/s2 (b) What is the speed of the second rider as she crosses the finish line? m/s (c) What is the second rider's average speed over the final 77 m of the race? m/s
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