1. The rate of change of displacement is called   velocity   speed   force   acceleration   Hint Half-n-half Clue   2. Acceleration = (change in _______) / (time taken for that change)   force   speed   velocity   displacement   Half-n-half Clue   3. The line segment BC on the velocity vs. time graph given above indicates that the object is constantly accelerating.   True   False   4. Which of the following quantities is a vector?   distance   velocity   time   speed   Half-n-half Clue   5. 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   6. Consider the graph of velocity (in m/s) vs. time (in s) given above. During the last 2 seconds, the object   reduces its velocity from 10 m/s to zero.   is constantly decelerating at 10 m/s2.   is constantly accelerating at 10 m/s2.   covers a distance of 10 m.   Half-n-half Clue   7. The acceleration due to gravity on the Earth's surface is   0.98 m/s2   9.8 m/s2   98 m/s2   980 m/s2   Half-n-half Clue