1. 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.   reduces its velocity from 10 m/s to zero.   is constantly accelerating at 10 m/s2.   Hint Half-n-half Clue   2. If velocity is measured in meters per second and time in seconds, then the units of acceleration are   second2 / meter   meter / second2   second / meter   meter / second   Half-n-half Clue   3. Speed is defined as   velocity / time   mass / volume   time / distance   distance / time   Half-n-half Clue   4. The line segment BC on the distance vs. time graph given above indicates that the object is moving at a constant speed.   True   False   5. If an object starts from rest and attains a velocity of 16 feet per second after 4 seconds, then its acceleration in feet per second2 is   4   64   256   None of these   Half-n-half Clue   6. If displacement is measured in meters and time in seconds, then the units of velocity are   second2 / meter   meter / second   meter / second2   second / meter   Half-n-half Clue   7. Which of the following quantities is a vector?   speed   time   velocity   distance   Half-n-half Clue