A sprinter explodes out of the starting block with an acceleration of +2.3 m/s^2, which she sustains for 1.2s. Then, her acceleration drops to zero for the rest of the race. What is her velocity (a) at t=1.2s and (b) at the end of the race?
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Step 1
2s can be calculated using the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Here, the initial velocity (u) is 0 (as she starts from rest), the acceleration (a) is +2.3 m/s^2, and the time Show more…
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