1. Acceleration can be negative.   True   False   2. If velocity is measured in meters per second and time in seconds, then the units of acceleration are   second / meter   meter / second   meter / second2   second2 / meter   Hint Half-n-half Clue   3. If displacement is measured in meters and time in seconds, then the units of velocity are   meter / second   meter / second2   second2 / meter   second / meter   Half-n-half Clue   4. Which of the following quantities is a scalar?   velocity   force   acceleration   speed   Half-n-half Clue   5. If an object starts from rest and attains a velocity of 15 feet per second after 3 seconds, then its acceleration in feet per second2 is   5   45   135   None of these   Half-n-half Clue   6. If an object moves through equal distances in equal times, then it is moving at a constant _______.   displacement   velocity   speed   acceleration   Half-n-half Clue   7. Which of the following quantities is a vector?   time   velocity   distance   speed   Half-n-half Clue