1. Which of the following quantities is a scalar?   velocity   acceleration   force   speed   Hint Half-n-half Clue   2. Both speed and velocity have the same units of measurement.   True   False   3. 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   4. Which of the following quantities is a vector?   time   velocity   distance   speed   Half-n-half Clue   5. Consider the graph of velocity (in m/s) vs. time (in s) given above. In the first 8 seconds, the object has traveled a distance of   110 m   100 m   160 m   20 m   Half-n-half Clue   6. The rate of change of displacement is called   force   velocity   acceleration   speed   Half-n-half Clue   7. The line segment BC on the distance vs. time graph given above indicates that the object is moving at a constant speed.   True   False