1. The line segment BC on the velocity vs. time graph given above indicates that the object is constantly accelerating.   True   False   2. Acceleration can be negative.   True   False   3. A bus covers a distance of 160 miles in 4 hours. Its average speed in miles per hour is   4   40   640   None of these   Hint Half-n-half Clue   4. Consider the graph of distance (in m) vs. time (in s) given above. The object's speed during the first 5 seconds is   4 m/s   5 m/s   20 m/s   100 m/s   Half-n-half Clue   5. If displacement is measured in meters and time in seconds, then the units of velocity are   meter / second   meter / second2   second / meter   second2 / meter   Half-n-half Clue   6. The rate of change of displacement is called   acceleration   velocity   speed   force   Half-n-half Clue   7. Which of the following quantities is a scalar?   acceleration   force   speed   velocity   Half-n-half Clue