Question

A runner is training for an upcoming race. In order to track the pace of the run, the runner is able to record time splits for the entire period. This allows the runner to produce the following velocity versus time graph given below. The run is broken into six segments. Answer the questions below concerning this graph 5.00 4.75 4.50 V 4.25 4.00 3.75 3.50 3.25 1 3.00 2.75 y (m/s) 2.50 2.25 2.00 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 time (s) The average acceleration of the runner during segment 1 is zero O negative O flat positive (Scroll down for more questions.)

Answer 1

average acceleration = change in velocity / change in time

in segment 1

change in velocity = 0 so,

average acceleration will be 0 m/s^2

in segment 4

average acceleration = 4.25 - 3.5 / (75 - 60)

average accleration = 0.05 m/s^2

in segment 5

average acceleration = 3.25 - 4.25 / (90 - 75)

average acceleration = -0.067 m/s^2