The graph shown represents the relationship between distance and time for an object in motion. During which interval is the speed of the object changing? The accompanying diagram represents the relationship between velocity and time of A. AB B. BC travel for four cars, A, B, C, and D, in straight-line motion. C. CD D. DE Velocity vs. Time DISTANCE Velocity B TIME 10. 15 20 . Time (s) Which car has the greatest acceleration during the time interval 10. seconds to 15 seconds? A. A B. B C. C D. D A red ball and a green ball are simultaneously A car travels from A to B at a constant thrown horizontally from the same height. 100 km/hr. The red ball has an initial speed of 40. meters per second and the green ball has an initial speed of 20. meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be Which of the following changes? A. the same A. speed B. twice as much B. velocity C. half as much C. frame of reference D. four times as much D. speed and velocity3-. The diagram below is a velocity vs. time graph of an object. Use the diagram to calculate the acceleration of the object. 7.0 A. 0.50 m/s2 B. 2.0 m/s2 Velocity (m/s) C. 0.60 m/s2 2.0 1.0 D. 1.7 m/s2 2.0 4.0 6.0 8.0 10.0 E. 1.0 m/s2 Elapsed time (8)