One Dimensional Motion

Acceleration is the time-rate change in
1. velocity
2. displacement
3. speed
4. distance
Which is a scalar quantity?
1. acceleration
2. displacement
3. force
4. distance
A runner completed the 100.-meter dash in 10.0 seconds. Her average speed was
1. 1,000. m/s
2. 0.100 m/s
3. 10.0 m/s
4. 100.m/s
Which statement about the movement of an object with zero acceleration is true?
1. The object may be slowing down
2. The object may be in motion
3. The object must be at rest
4. 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?
1. 20. m/s
2. 4.0 m/s
3. 24 m/s
4. 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
1. 9.8 m/s**2
2. 53 m/s**2
3. 15 m/s**2
4. 3.0 m/s**2
Which two terms represent a vector quantity and the scalar quantity of the vector's magnitude, respectively?
1. displacement and distance
2. acceleration and velocity
3. speed and time
4. 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?
1. 3.8 seconds
2. 4.6 seconds
3. 1.72 seconds
4. .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?
1. 3.8 seconds
2. 4.6 seconds
3. 1.72 seconds
4. .86 seconds
A woman walks 5.0 m north then 5.0 m west. The resultant of these two vectors is approximately
1. 5.0 m northwest
2. 7.0 m northwest
3. 5.0 m southwest
4. 7.0 m southwest