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2. The following velocity-vs-time graph represents the motion of a race car during the first few sec- onds of a race. The track may be assumed to be straight during this period. Afterwards the car continues to travel at a constant speed around the rest of the track, ending its lap back on the start/finish line. [16 points] velocity (m/s) 45 25 -time (S) 6 (a) What is the cars velocity after one second? [3] (b) How far has it traveled in the first six seconds? [9] (c) Do you have enough information to determine the average velocity over the duration of one full lap? If so, what? If not, what information would you need to calculate it? [4]

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