Answer
a. frame 3 and frame 6
b. between frame 4 and frame 5
Work Step by Step
a. At frame 3 and frame 6, the cars are in the same position.
b. Car A moves at a constant speed, while car B gradually slows down from a fast speed to a very slow speed. Between frame 4 and frame 5, the two cars have the same speed. We can see that the two cars move about the same distance from frame 4 to frame 5.
