1. Negative acceleration is also called .
A) speed
B) velocity
C) deceleration
D) displacement

2. An object with an acceleration of –10 m/s2 is .
A) speeding up 10 m/s every second
B) slowing down 10 m/s every second
C) moving at a constant speed of –10 m/s
D) moving at a constant velocity of –10 m/s

3. When an object's speed and direction are known, so is its .
A) speed
B) velocity
C) acceleration