Unit 1 Review

1. If an object has an acceleration of 0 m/s2, then one can be sure that the object is not

 a. moving b. changing position c. changing velocity

Acceleration (14 seconds)

2. If car A passes car B, then car A must be

1. accelerating.
2. accelerating at a greater rate than car B.
3. moving faster than car B and accelerating more than car B.
4. moving faster than car B, but not necessarily accelerating.

Acceleration (14 seconds) | Speed vs. Velocity (8 seconds)

3. Which one of the following is NOT consistent with a car which is accelerating?

1. moving with an increasing speed.
2. moving with a decreasing speed.
3. moving with a high speed.
4. changing direction.

Acceleration (14 seconds)

4. Barry Sanders is running down the football field in a straight line. He starts at the 0-yard line at 0 seconds. At 1 second, he is on the 10-yard line; at 2 seconds, he is on the 20-yard line; at 3 seconds, he is on the 30-yard line; and at 4 seconds, he is on the 40-yard line. This is evidence that

1. he is accelerating
2. he is covering a greater distance in each consecutive second.
3. he is moving with a constant speed (on average).

Acceleration (14 seconds) | Speed vs. Velocity (8 seconds)

5. Barry Sanders is running down the football field in a straight line. He starts at the 0-yard line at 0 seconds. At 1 second, he is on the 10-yard line; at 2 seconds, he is on the 20-yard line; at 3 seconds, he is on the 30-yard line; and at 4 seconds, he is on the 40-yard line. What is Barry's acceleration?

Acceleration (14 seconds) | Speed vs. Velocity (8 seconds)

6. Olympic gold medalist Michael Jackson runs one time around the track - 400 meters - in 38 seconds. What is his displacement? ___________ What is his average velocity? ___________

Distance vs. Displacement (6 seconds) | Speed vs. Velocity (8 seconds)

7. If an object is moving eastward and slowing down, then the direction of its velocity vector is

 a. eastward b. westward c. neither d. not enough info to tell

Speed vs. Velocity (8 seconds)

8. If an object is moving eastward and slowing down, then the direction of its acceleration vector is

 a. eastward b. westward c. neither d. not enough info to tell

Acceleration (14 seconds)

9. Which one of the following quantities is NOT a vector?

 a. 10 mi/hr, east b. 10 mi/hr/sec, west c. 35 m/s, north d. 20 m/s

Scalars vs. Vectors (3 seconds)

10. Which one of the following quantities is NOT a speed?

 a. 10 mi/hr b. 10 mi/hr/sec c. 35 m/s d. 20 m/s

Speed vs. Velocity (8 seconds)

11. Which one of the following statements is NOT true of a free-falling object? An object in a state of free fall

1. falls with a constant speed of -10 m/s.
2. falls with a acceleration of -10 m/s/s.
3. falls under the sole influence of gravity.
4. falls with downward acceleration which has a constant magnitude.

Introduction to Free Fall (4 seconds) | The Acceleration of Gravity (6 seconds)

12. The average speed of a horse which gallops 10 kilometers (km) in 30 minutes is

 a. 10 km/hr b. 20 km/hr c. 30 km/hr d. more than 30 km/hr

Speed vs. Velocity (8 seconds)

13. What is the acceleration of a car that maintains a constant velocity of 100 km/hr for 10 seconds?

 a. 0 b. 10 km/hr/s c. 10 km/s/s d. 1000 km/hr/s

Acceleration (14 seconds)

14. As an object freely falls, its

 a. speed increases b. acceleration increases c. both of these d. none of these

Introduction to Free Fall (4 seconds) | The Acceleration of Gravity (6 seconds)

15. If a freely-falling object were somehow equipped with a speedometer, its speed reading (neglecting air resistance) would increase each second by about

 a. 5 m/s. b. 10 m/s. c. 15 m/s. d. a variable amount. e. depends on its initial speed.

The Acceleration of Gravity (6 seconds) | Kinematic Equations and Free Fall (8 seconds)

16. Ten seconds after starting from rest, a freely-falling object will have a speed of about

 a. 10 m/s. b. 50 m/s. c. 100 m/s. d. more than 100 m/s.

The Acceleration of Gravity (6 seconds) | Kinematic Equations and Free Fall (8 seconds)

17. As a baseball is thrown, its speed increases from 0 to 30 m/s in 0.10 seconds. The average acceleration of the baseball is

 a. 3m/s2. b. 30 m/s2. c. 300 m/s2. d. 3000 m/s2. e. none of these

Acceleration (14 seconds)

18. A rocket accelerates from rest for 1 minute at 50 m/s2. The rocket's speed will be

 a. 50 m/s b. 500 m/s c. 3000 m/s d. 3600 m/s e. none of these

Acceleration (14 seconds)

19. If you drop an object, it will accelerate downward at a rate of 9.8 m/s2. If you instead throw its downwards, it acceleration (in the absence of air resistance) will be

 a. less than 9.8 m/s2. b. 9.8 m/s2. c. more than 9.8 m/s2.

Introduction to Free Fall (4 seconds) | The Acceleration of Gravity (6 seconds)

20. Consider drops of water that leak from a dripping faucet at a constant rate. As the drops fall they

 a. get closer together. b. get farther apart. c. remain at a relatively fixed distance from one another.

Introduction to Free Fall (4 seconds) | The Acceleration of Gravity (6 seconds)

21. Renatta Oyle is again found driving her '86 Yugo down Lake Avenue, leaving the following trail of oil drops on the pavement.

If her car is moving from right to left, then ...

1. her velocity has a rightward direction and her acceleration has a rightward direction.
2. her velocity has a rightward direction and her acceleration has a leftward direction.
3. her velocity has a leftward direction and her acceleration has a rightward direction.
4. her velocity has a leftward direction and her acceleration has a leftward direction.

Ticker Tape Diagrams (6 seconds) | The Acceleration (14 seconds)

The velocity-time graph below depicts the motion of an automobile as it moves through Glenview during rush hour traffic. Use the graph to answer questions #22 - #26.

22. Determine the displacement of the automboile during the following intervals of time. PSYW

 t = 0 s - 5 s t = 5 s - 15 s t = 15 s - 20 s

Determining the Area on a v-t Graph (12 seconds)

23. Determine the velocity of the automobile at the following instant(s) in time.

 t = 3 s t = 8 s t = 17 s

24. Determine the acceleration of the automobile during the following intervals of time.
 t = 0 s - 5 s t = 5 s - 15 s t = 15 s - 20 s

The Meaning of Slope for a v-t Graph (9 seconds) | Determining the Slope on a v-t Graph (8 seconds)

25. Using complete sentences and the language of physics, describe the motion of the automobile during the entire 20 seconds. Explicitly describe any changes in speed or direction which might occur; identify intervals of time for which the automobile is at rest, the automobile is moving with constant speed, or the automobile is accelerating.

The Meaning of Shape for a v-t Graph (8 seconds) | Relating the Shape to the Motion (12 seconds)

26. Supposing the automobile has an oil leak, demonstrate your understanding of its motion by drawing an oil drop diagram for the 20 seconds of motion. Divide the diagram into three distinct time intervals (0-5 seconds, 5-15 seconds, 15-20 seconds).

The Meaning of Slope for a v-t Graph (9 seconds) | Determining the Slope on a v-t Graph (8 seconds) | Ticker Tape Diagrams (6 seconds)

27. Convert the following position-time graphs to velocity-time graphs. For each graph, describe the motion in words.

The Meaning of Shape for a p-t Graph (14 seconds) | The Meaning of Slope for a p-t Graph (8 seconds) | The Meaning of Shape for a v-t Graph (8 seconds) | Relating the Shape to the Motion (12 seconds)

28. Convert the following velocity-time graphs to position-time graphs. For each graph, describe the motion in words.

The Meaning of Shape for a v-t Graph (8 seconds) | Relating the Shape to the Motion (12 seconds) | The Meaning of Shape for a p-t Graph (14 seconds) | The Meaning of Slope for a p-t Graph (8 seconds)

For practice with kinematic equations, see Lesson 6 of Unit 1 of The Physics Classroom. There you will see 20 problems with answers and written explanations.

For additional practice with graphical description of motion, see the Graphing Practice page. There you will see 37 problems with answers and written explanations.