- Acceleration is the time-rate change in
- velocity
- displacement
- speed
- distance

- Which is a scalar quantity?
- acceleration
- displacement
- force
- distance

- A runner completed the 100.-meter dash in 10.0 seconds. Her average speed was
- 1,000. m/s
- 0.100 m/s
- 10.0 m/s
- 100.m/s

- Which statement about the movement of an object with zero acceleration is true?
- The object may be slowing down
- The object may be in motion
- The object must be at rest
- The object may be speeding up

- A car moving at a speed of 8.0 meters per second enters a highway and accelerates at 3.0 meters per second**2. How fast will the car be moving after it has accelerated for 56 meters?
- 20. m/s
- 4.0 m/s
- 24 m/s
- 18 m/s

- The velocity of a car changes from 60. meters per second north to 45 meters per second north in 5.0 seconds. The magnitude of the car's acceleration is
- 9.8 m/s**2
- 53 m/s**2
- 15 m/s**2
- 3.0 m/s**2

- Which two terms represent a vector quantity and the scalar quantity of the vector's magnitude, respectively?
- displacement and distance
- acceleration and velocity
- speed and time
- weight and force

- A baseball pitcher throws a fastball at 21 meters per second. If the batter is 18 meters from the pitcher, approximately how much time does it take for the ball to reach the batter?
- 3.8 seconds
- 4.6 seconds
- 1.72 seconds
- .86 seconds

- A baseball pitcher throws a fastball at 21 meters per second. If the batter is 18 meters from the pitcher, approximately how much time does it take for the ball to reach the batter?
- 3.8 seconds
- 4.6 seconds
- 1.72 seconds
- .86 seconds

- A woman walks 5.0 m north then 5.0 m west. The resultant of these two vectors is approximately
- 5.0 m northwest
- 7.0 m northwest
- 5.0 m southwest
- 7.0 m southwest