Directions: Write the letter of the correct answer on a separate sheet of t paper. 1. Which graph describes an object moving with constant speed? C 2. Which of the following differentiates scalar and vector quantities? a. Scalar gives only magnitude while vector gives direction. b. Scalar gives direction while vector gives magnitude and direction. c. Scalar gives magnitude and direction while vector gives direction only. d. Scalar gives only magnitude while vector gives magnitude and direction. 3. On a velocity vs. time graph, what pepresents a line that crosses the x axis? a. The time is not moving b. The velocity is increasing e. The object is accelerating d. The object is changing direction 4. When a velocity is vector, what must be included? a. units. b. direction c. magnitude d. magnitude and direction. 5. What does a horizontal line on a speed-time graph indicate? a. constant speed b. constant yelocity Ceenatant distance d. constant acceleration-​