A sprinter explodes out of the starting block with an acceleration of 2.3m/s2 , which she sustains for 1.2 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity (a) at t = 1.2 s and (b) at the end of the race?
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Answer:
Explanation:
V = 2.3m/s^2 * 1.2s = 2.76m/s.
b. Since the acceleration dropped to
0 at 1.2 sec, the velocity remained
constant at 2.76m/s.
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