Its 25 Name_ Date Pd Constant Velocity Particle Model Worksheet 3: Position vs. Time Graphs 1. Robin, rollerskating down a marked sidewalk, was observed at the following positions at the times listed below: t (s) x (m) 0.0 10.0 1.0 12.0 2.0 14.0 5.0 20.0 8.0 26.0 10.0 30.0 a. Plot a position vs. time graph for the skater. b. Explain how you can use the graph to determine how far he was from the origin at t = 6.0s. c. Write a mathematical expression that describes the skater's motion. d. Was his speed constant over the entire interval? How do you know? Modeling Instruction- AMTA 2013 U2 Constant Velocity - ws3 v3.12. In a second trial, the timer started her watch a bit sooner. The following data were obtained: t (s) x (m) 0.0 4.0 X 2.0 10.0 4.0 16.0 6.0 22.0 8.0 28.0 10.0 34.0 a. Plot the position vs. time graph for the skater. b. How far from the origin was the skater at t = 5.0s? How do you know? c. Was the skater's speed constant? If so, what was it? d. In the first trial, the skater was further along at 2s than he was in the second trial. Does this mean that he was going faster? Explain your answer. Modeling Instruction- AMTA 2013 2 U2 Constant Velocity - ws3 v3.1