Journal 10/22

A car moves straight in one direction at a velocity of 10 m/s for 5 seconds. It then stops and stays still for 10 seconds. Finally it travels in the opposite direction at 7 m/s for 10 seconds. It then stops completely.

Richard's Position vs. Time graph doesn't work because when the car travels in the opposite direction, the position should be increasing, not decreasing. The Velocity vs. Time graph does not match because the Velocity is not a negative trend.

Eva's Postition vs. Time graph matches the description perfectly. Eva's Velocity vs. Time graph also matches the description perfectly.

Dorothy's Position vs. Time graph matches the description perfectly however it is preferable to have started from an even number on the graph. Dorothy's Velocity vs. Time graph does not match because according to her graph the velocity is -10 m/s which does not match the positive trend.

Both of Eva's graphs are superior to the rest of the graphs. The graphs match the description of the movement of the car in every aspect where as the other graphs do not completely match the description, with the exception of Dorothy's position vs. time graph.