1. Which of the following quantities is a scalar?   speed   velocity   force   acceleration   Hint Half-n-half Clue   2. 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   3. The rate of change of velocity is called   acceleration   momentum   speed   force   Half-n-half Clue   4. The rate of change of displacement is called   force   velocity   speed   acceleration   Half-n-half Clue   5. If an object starts from rest and attains a velocity of 20 feet per second after 4 seconds, then its acceleration in feet per second2 is   5   80   320   None of these   Half-n-half Clue   6. Which of the following quantities is a vector?   time   speed   distance   velocity   Half-n-half Clue   7. A toy plane moves at a constant speed of 2 m/s. It will travel a distance of 26 m in   13 s   52 s   130 s   None of these   Half-n-half Clue