1. Speed is defined as   mass / volume   distance / time   time / distance   velocity / time   Hint Half-n-half Clue   2. Which of the following quantities is a scalar?   force   velocity   speed   acceleration   Half-n-half Clue   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. Consider the graph of velocity (in m/s) vs. time (in s) given above. During the last 2 seconds, the object   is constantly decelerating at 10 m/s2.   covers a distance of 10 m.   is constantly accelerating at 10 m/s2.   reduces its velocity from 10 m/s to zero.   Half-n-half Clue   5. Both speed and velocity have the same units of measurement.   True   False   6. The rate of change of displacement is called   force   speed   velocity   acceleration   Half-n-half Clue   7. Which of the following quantities is a vector?   velocity   time   distance   speed   Half-n-half Clue