3. Suppose now that our skater was observed in a third trial. The following data were obtained: (s) x (m) 0.0 0.0 2.0 2.0 X 4.0 4.0 6.0 4.0 8.0 3.0 10.0 2.0 12.0 2.0 14.0 5.0 16.0 8.0 a. Plot the position vs. time graph for the skater. b. What do you think is happening during the time interval: t = 4s to t = 6s? How do you know? c. What do you think is happening during the time interval: t = 6s to t = 10s? How do you know? d. Determine the skater's average velocity from t = Os to t = 16s. (Average velocity is the displacement (final position minus initial position) divided by time elapsed.) . Determine the skater's average speed from t = 0s to t = 16s. (Average speed path length divided by time elapsed.) 4a. In what situation might average speed be a better measure of motion than average velocity? 4b. In what situation might average velocity be a better measure of motion than average speed? Modeling Instruction- AMTA 2013 w U2 Constant Velocity - ws3 v3.15. Rank the following: A B C - x (m) x (m) 10 + 0 O 0 0 lot (s) 0 10 t (s) 0 10 t (s) D E F ox ( m ) 10 15 5 3 0 0 10 t ( s) 0 10 t(s) 3 10 t ( s) a. Rank the graphs according to which show the greatest average velocity from the beginning to the end of the motion. (Zero is greater than negative, and ties are possible.) Most pos. v 1 3_ Most neg. v Explain your reasoning for your ranking: b. Rank the graphs according to which show the greatest average speed from the beginning to the end of the motion. Greatest 1 2_ 3 Least Explain your reasoning for your ranking: Modeling Instruction- AMTA 2013 4 U2 Constant Velocity - ws3 v3.1