1-D

Runners A and B are nearing the end of a race. The last portion of track before the finish line is straight. Both runners are moving at a constant speed of 5 m/s. When runner A is 50 m behind runner B, she starts to accelerate at a constant rate of $0.25 \text{ m/s}^2$ .

At this moment, runner B, still going a constant speed, is 100 m from the finish line

Part a) Who wins the race?